This calculator estimates the calories, carbohydrate, sugar, fibre and vitamin C in a serving of Arbutus unedo fruit, adjusting for how ripe it is and whether you eat it raw, cooked or dried. It suits a home grower curious about the fruit in the garden and a smallholder writing honest labels for a jam or dried-fruit product.
Loading calculator...
Strawberry tree fruit is unusually high in vitamin C for a temperate tree fruit, but the number on a nutrition table depends heavily on ripeness and preparation. A ripe raw berry, a cooked jam and a dried snack made from the same fruit carry very different sugar and vitamin loads.
Enter a serving weight and a few choices about form and ripeness, and the tool returns per-serving nutrition plus the share of a daily vitamin C reference it covers. The figures are planning estimates, not a lab assay, and they lean on published values for the species rather than a single measured sample.
π± How to use the strawberry tree nutrition calculator
Start with serving weight in grams, default 100 g, which is roughly a small handful of berries or a couple of tablespoons of jam. If you prefer, switch the serving unit to berries or cups and the tool converts for you using a fixed berry and cup weight.
The serving unit control offers grams, berries and cup. Choosing berries multiplies your count by an average single-berry weight, while cup uses a packed-cup weight for whole fruit. Growers weighing on a kitchen scale stay in grams; cooks following a recipe often think in cups.
Ripeness stage comes next, matching the ripeness checker’s bands: near-ripe, ripe and peak. Sugar climbs steeply as the fruit ripens, so this choice moves the calorie and sugar figures more than any other. Vitamin C also shifts, peaking around full ripeness before declining in over-ripe fruit.
Vitamin C in Arbutus unedo is among the highest of any temperate fruit tree, with published figures for ripe fruit often quoted in the range of tens of milligrams per 100 g. The tool uses a mid-range value and adjusts it for ripeness and preparation.
Preparation lets you pick raw, cooked or dried. Raw fruit keeps the most vitamin C. Cooking destroys a large share of it and can concentrate sugars slightly through water loss. Drying removes most of the water, which multiplies calories, sugar and fibre per gram while cutting vitamin C sharply.
The last field is added sugar in grams, default 0. This matters for cooked products like jam, where the sugar you stir in can dwarf the fruit’s own. Entering it lets a jam maker see the true sugar and calorie load of a serving rather than the fruit’s alone.
As you move ripeness up, the calorie and sugar tiles rise. Switch preparation to dried and every per-serving number jumps because you are now weighing concentrated fruit. Add sugar and the sugar and calorie figures climb while vitamin C per serving stays fixed to the fruit content.
π± Calculator fields explained
Serving weight (g) – The mass of the portion, default 100 g. All nutrient figures scale from this. Weigh the edible fruit, not stalks or stones.
Serving unit (grams/berries/cup) – How you express the portion, default grams. Berries multiplies a count by an average berry weight; cup uses a packed-cup weight. Both convert to grams internally.
Ripeness stage – Near-ripe, ripe or peak, default ripe. Drives sugar and calorie content upward as the fruit ripens and adjusts vitamin C, which peaks near full ripeness.
Preparation (raw/cooked/dried) – Raw, cooked or dried, default raw. Cooking cuts vitamin C heavily; drying concentrates every nutrient per gram and reduces vitamin C further.
Added sugar (g) – Sugar stirred into a cooked product, default 0. Adds directly to the sugar and calorie totals without changing vitamin C or fibre.
π± Understanding the results
The tool prints seven figures describing the serving. The vitamin C line and its daily-percentage partner are usually the reason people open this calculator for strawberry tree fruit.
| Result | What it means | Action it drives |
|---|---|---|
| Calories | Energy in the serving | Fit the fruit into a daily intake |
| Carbohydrates | Total carbohydrate in grams | Judge the fruit for a carb-aware diet |
| Sugars | Fruit sugar plus any added sugar | See the real sweetness load |
| Fibre | Dietary fibre in grams | Count toward a daily fibre target |
| Vitamin C | Ascorbic acid in milligrams | Gauge the fruit’s headline nutrient |
| Percent daily vitamin C | Share of a reference daily value | Compare against other fruit |
| Portion note | Context on serving size and use | Read the number sensibly |
The hero number for most users is vitamin C. In the reconstructed model, 100 g of ripe raw fruit delivers around 30 mg, roughly a third of a common 90 mg daily reference. That places strawberry tree fruit well above apples or pears and closer to citrus.
Calories are the first secondary figure. Ripe raw fruit sits near 55 to 65 kcal per 100 g, comparable to grapes, driven mostly by sugar. Fibre is the quiet strength: the seedy, stone-celled flesh carries a high fibre load for a fruit, often 6 g or more per 100 g raw.
These figures are planning estimates for whole-food nutrition, not medical or clinical values. Vitamin C content varies widely with cultivar, ripeness and storage, and this tool is not a basis for treating any deficiency. Speak to a professional for dietary or medical decisions.
Preparation reshapes the whole picture. Cooking into jam can strip more than half the vitamin C, so a cooked serving that looks identical in weight carries far less than raw. Drying concentrates the fruit: a 30 g dried portion can hold as much sugar and fibre as 120 g of fresh, but with much reduced vitamin C.
Added sugar lands entirely in the sugar and calorie lines. Jam sugar can more than double the sugar of a serving. A 30 g jam portion might carry only a few grams of fruit sugar but ten or more grams of added sugar, which the tool shows plainly.
Read the extremes with care. A dried serving with added sugar can look alarmingly high in sugar per gram, which is correct: dried sweetened fruit is energy-dense. A near-ripe raw serving reads low in sugar and calories but also lower in vitamin C, since the fruit has not finished developing.
The portion note keeps the numbers honest, reminding you that a realistic strawberry tree serving is modest because the fruit is rich in fibre and, when over-ripe, mildly fermenting.
π± Calculation formulas
The tool scales a base nutrient density per 100 g by ripeness and preparation factors, converts the serving to grams, then adds any sugar. The core expression per nutrient is a chain of multipliers.
nutrient = base_per_100g Γ (serving_g Γ· 100) Γ ripeness_factor Γ prep_factor
sugars_total = fruit_sugar + added_sugar
calories = sugars_total Γ 4 + fibre Γ 2 + other_carb Γ 4
| Parameter | Reconstructed value (per 100 g raw ripe) |
|---|---|
| Calories | 60 kcal |
| Carbohydrate | 17 g |
| Sugars | 10 g |
| Fibre | 6.5 g |
| Vitamin C | 30 mg |
| Vitamin C daily reference | 90 mg |
| Average berry weight | 8 g |
| Cup weight (whole fruit) | 140 g |
| Ripeness factor (sugar) | Near-ripe 0.7, ripe 1.0, peak 1.25 |
| Ripeness factor (vitamin C) | Near-ripe 0.85, ripe 1.0, peak 0.9 |
| Prep factor calories/sugar | Raw 1.0, cooked 1.05, dried 3.5 |
| Prep factor vitamin C | Raw 1.0, cooked 0.4, dried 0.3 |
Percent daily vitamin C is the vitamin C in milligrams divided by the 90 mg reference, times 100.
Drying uses a factor of about 3.5 for energy and sugar because roughly 70 percent of the fruit’s weight is water. Remove the water and the same nutrients pack into under a third of the mass, which is why dried fruit reads so energy-dense.
Worked example at defaults: 100 g, ripe, raw, no added sugar. Sugars are 10 Γ 1.0 Γ 1.0 = 10 g. Vitamin C is 30 Γ 1.0 Γ 1.0 = 30 mg, which is 30 Γ· 90 Γ 100 = 33 percent of the daily reference. Calories come to about 60 kcal. Fibre is 6.5 g.
Change preparation to dried and the same 100 g reads about 210 kcal, 35 g sugar, 22 g fibre and only 9 mg vitamin C, since the vitamin C prep factor of 0.3 outweighs the concentration. That is why dried strawberry tree fruit is a fibre and energy food, not a vitamin C source.
π± Practical examples
Each scenario lists inputs, calculation and what the number tells the eater or the label writer.
1. A garden handful. Inputs: 50 g, ripe, raw. Half the base: 30 kcal, 5 g sugar, 3.25 g fibre, 15 mg vitamin C, 17 percent daily. Next: a light snack that still covers a sixth of daily vitamin C.
2. Ten berries off the tree. Inputs: 10 berries, ripe, raw. At 8 g each that is 80 g: 48 kcal, 8 g sugar, 5.2 g fibre, 24 mg vitamin C, 27 percent daily. Next: a realistic single serving straight from the branch.
3. A cup of fresh fruit. Inputs: 1 cup, peak, raw. 140 g at peak sugar (factor 1.25): about 105 kcal, 17.5 g sugar, 9.1 g fibre, 37.8 mg vitamin C at the peak vitamin factor 0.9, 42 percent daily. Next: a generous dessert portion.
The Romans and later Mediterranean households ate strawberry tree fruit fresh and fermented it into a country liqueur. Its high vitamin C made it a useful autumn fruit long before anyone measured ascorbic acid.
4. Near-ripe fruit, picked early. Inputs: 100 g, near-ripe, raw. Sugar factor 0.7, vitamin C factor 0.85: 42 kcal, 7 g sugar, 6.5 g fibre, 25.5 mg vitamin C, 28 percent daily. Next: less sweet, still a solid vitamin C serving.
5. A jam portion, fruit only. Inputs: 30 g, ripe, cooked, 0 added sugar. Cooked vitamin C factor 0.4: 18.9 kcal, 3 g sugar, 1.95 g fibre, 3.6 mg vitamin C, 4 percent daily. Next: shows how much vitamin C cooking removes before any sugar is added.
6. A jam portion as actually made. Inputs: 30 g serving, ripe, cooked, 12 g added sugar. Fruit sugar 3 g plus 12 g added is 15 g sugar; calories rise to about 68 kcal; vitamin C stays 3.6 mg. Next: added sugar makes up 80 percent of this serving’s sugar. Label it honestly.
7. A dried snack for a smallholder label. Inputs: 30 g, ripe, dried, 0 added sugar. Dried factor 3.5 on a 30 g base: about 63 kcal, 10.5 g sugar, 6.8 g fibre, 2.7 mg vitamin C. Next: market it on fibre and energy, not vitamin C.
8. Commercial nutrition panel per 100 g dried. Inputs: 100 g, ripe, dried. About 210 kcal, 35 g sugar, 22.75 g fibre, 9 mg vitamin C, 10 percent daily. Next: the per-100 g panel a packer needs for the pack.
9. Edge case, over-ripe fruit read as peak. Inputs: 100 g, peak, raw. Sugar hits 12.5 g and calories about 75 kcal, but real over-ripe fruit may be fermenting, so treat vitamin C as an upper bound. Next: eat modestly and do not rely on the vitamin C figure for very soft fruit.
π± Tips and best practices
Weigh the edible fruit, not the whole pick. Stalks and any stones you spit out are not food, and including them inflates every per-serving number.
Pick the ripeness stage honestly. Sugar rises about 25 percent from ripe to peak, so calling near-ripe fruit peak overstates the calories and understates nothing you want to under-report on a label.
For labels, run the calculator per 100 g in the exact preparation you sell. A dried-fruit pack and a fresh punnet need different panels, and mixing them misleads the buyer.
If you sell a cooked product, always enter your real added sugar. The fruit’s own sugar is modest; the jar’s sweetness usually comes from the sugar you stir in, and an honest panel builds trust with buyers.
Treat vitamin C figures as an upper estimate for fresh fruit only. The vitamin degrades in storage and cooking, so a punnet sold a week after picking carries less than the tool’s fresh number.
Lean on fibre when marketing dried or cooked strawberry tree products. The stone-celled flesh gives a genuinely high fibre content, which survives drying and cooking far better than the vitamin C.
Keep servings modest for over-ripe fruit. Soft fermenting berries carry trace alcohol and can upset the stomach in quantity, and the sweetness tempts larger portions than are comfortable.
Cross-check the ripeness stage against the ripeness checker if you have both fruit and a refractometer. A measured Brix confirms whether your fruit is really at peak or merely ripe, which sharpens the sugar figure.
β οΈ Common mistakes to avoid
Claiming raw vitamin C on a cooked product
Cooking strawberry tree fruit into jam removes well over half its vitamin C. A jam label quoting the raw figure overstates the nutrient two to three times.
Printing a raw vitamin C figure on a cooked jar is a false nutrition claim that can breach labelling rules and lose a retailer’s trust in a single audit.
Set preparation to cooked before reading the vitamin C line for any heated product.
Forgetting added sugar in jam
The fruit’s own sugar is modest, so a jam serving’s sweetness comes mostly from added sugar. Leaving the added-sugar field at zero produces a sugar figure a fraction of the truth.
Enter the real recipe sugar per serving so the sugar and calorie lines reflect what people eat.
Reading dried numbers as if they were fresh
Dried fruit is concentrated, so a 30 g dried serving is not comparable to 30 g fresh. Treating them as equal understates the energy of the dried snack by a factor of three.
Compare on the same preparation, or weigh out a realistic dried portion of 20 to 30 g rather than a fresh-fruit 100 g.
Overstating the serving size
The fruit is high in fibre and, when over-ripe, mildly fermenting, so a realistic serving is a handful, not a bowl. Nutrition figures built on a 200 g serving look impressive but describe a portion few people eat at once.
Base labels on a modest 80 to 100 g fresh serving and let the per-100 g panel carry the comparison.
Trusting a single vitamin C number as fixed
Vitamin C in Arbutus unedo varies widely with cultivar, ripeness and storage. Quoting one exact figure as gospel misleads.
Presenting a precise vitamin C claim from a single estimate invites a challenge you cannot defend, because a lab test on your own fruit will rarely match to the milligram.
Treat the figure as a range and, for a commercial label, back it with an actual assay of your product.
Ignoring vitamin C loss in storage
Vitamin C falls steadily after picking, so fruit sold days later carries less than the fresh estimate. A week of storage can cut vitamin C by a quarter or more.
Sell and eat the fruit soon after picking if the vitamin C matters, and do not quote the fresh figure for aged stock.
π± When to use this calculator
Use it when you are writing a nutrition panel for a strawberry tree product and need per-100 g figures in the right preparation. That is where the preparation and added-sugar controls change the numbers you must legally print.
Reach for it when you are deciding how the fruit fits a diet, whether counting carbohydrate, tracking vitamin C, or looking for a high-fibre autumn fruit. The per-serving figures let you slot it in against apples, grapes or citrus.
It also helps a grower explain the fruit to a hesitant buyer. A firm number on vitamin C and fibre answers the honest question of why anyone would eat a granular red berry off an ornamental tree.
The calculator estimates whole-food nutrition for planning and labelling. It is not a clinical tool and cannot replace a lab assay or a dietitian’s advice for any medical need.
Skip it for casual eating of a few berries in the garden. At that scale you do not need a number, and the fruit is a fine snack whether or not you tally its vitamin C.
π± Related calculators
- Arbutus ripeness
- Arbutus jam yield
- Arbutus tree yield
π± Glossary
Arbutus unedo – The strawberry tree, whose autumn fruit is high in vitamin C and fibre relative to other temperate tree fruit.
Vitamin C – Ascorbic acid, a water-soluble vitamin abundant in ripe strawberry tree fruit and easily lost to heat and storage.
Daily reference value – The benchmark daily intake against which a serving’s nutrient is expressed as a percentage, here 90 mg for vitamin C.
Dietary fibre – The indigestible plant matter that aids digestion, present in high amounts thanks to the fruit’s stone cells and skin.
Ripeness factor – A multiplier reflecting how sugar and vitamin C change as the fruit ripens from near-ripe to peak.
Preparation factor – A multiplier for raw, cooked or dried form, capturing water loss and vitamin destruction.
Why does dried fruit show more sugar than fresh? Because drying removes most of the water, so the same sugar sits in a much smaller weight. Gram for gram, dried fruit reads far sweeter than the fresh fruit it came from.
Added sugar – Sugar stirred into a cooked product, separate from the fruit’s own sugar and reported together in the sugars line.
Soluble solids – Dissolved sugars and other compounds, measured as Brix, that track ripeness and sweetness.
Ascorbic acid – The chemical name for vitamin C, sensitive to heat, light and oxygen.
Concentration – The effect of removing water, which raises the per-gram content of every nutrient that stays behind.
Serving weight – The mass of fruit or product in one portion, the basis for every nutrient figure.
Peak stage – The ripeness band with the highest sugar, where vitamin C has begun to ease down from its ripe maximum.
β Frequently asked questions
Is strawberry tree fruit really high in vitamin C?
Yes, relative to most temperate tree fruit. Ripe fruit in the reconstructed model carries about 30 mg per 100 g, a third of a common daily reference, well above apples or pears.
The exact figure varies with cultivar, ripeness and storage, and it falls with cooking and time off the tree, so treat 30 mg as a fresh, ripe estimate rather than a guarantee.
How many calories are in a handful?
A 50 g handful of ripe raw fruit is about 30 kcal, and a full 100 g serving around 60 kcal, close to grapes. The energy comes mostly from the fruit’s sugar.
Dried fruit is far denser: a small 30 g dried portion can match a 100 g fresh serving for calories, so weigh dried snacks carefully.
Does cooking destroy the vitamin C?
Much of it. The reconstructed cooked factor is 0.4, meaning jam retains under half the fresh vitamin C, and long boiling removes more.
If vitamin C is your reason for eating the fruit, eat it raw and soon after picking. Cooked products are better sold on their fibre and flavour.
Is the fruit good for a low-sugar diet?
Fresh fruit is moderate in sugar, around 10 g per 100 g at ripeness, and high in fibre, which slows sugar absorption. That makes a fresh handful reasonable for many carb-aware diets.
Jam and dried fruit are a different matter, since added and concentrated sugar push the figures up sharply. Check the sugar line for the exact preparation you plan to eat, and consult a professional for any medical diet.
Why is the fibre so high?
The flesh is dense with stone cells and the skin is thick, giving a fibre content around 6.5 g per 100 g raw, high for a fruit. That fibre survives cooking and drying well.
It is also why the fruit feels granular and why a realistic serving is modest: the fibre is filling.
Can I rely on these numbers for a product label?
They are planning estimates suitable for a first draft, not a legal assay. For a commercial label sold to the public, you generally need laboratory-verified figures for your specific product.
Use the calculator to design and sanity-check a panel, then confirm the printed values with an accredited lab before the product goes to a retailer.
The preparation and added-sugar controls at least get your draft into the right range for the form you sell.
How much fruit gives a full day of vitamin C?
At about 30 mg per 100 g of ripe raw fruit, roughly 300 g would cover a 90 mg daily reference. That is a large serving of a high-fibre fruit, so spreading it across the day is more comfortable.
In practice most people eat the fruit as one of several vitamin C sources rather than relying on it alone, and storage losses mean the real figure is often lower.
Does ripeness change the nutrition much?
Sugar and calories rise about 25 percent from ripe to peak, while vitamin C peaks near full ripeness and eases slightly in over-ripe fruit. Fibre stays roughly constant.
Picking the right ripeness stage in the tool matters most for the sugar and calorie figures, which is why the field sits high in the inputs.
Is dried strawberry tree fruit healthy?
It is energy and fibre dense, useful as a compact snack, but low in vitamin C because drying destroys most of it. A 30 g portion carries real sugar, so it is a treat rather than a light snack.
Read the dried figures on their own terms and do not market dried fruit as a vitamin C food.
Should I worry about eating too much?
Ripe fruit in normal amounts is a wholesome food. The main caution is over-ripe fruit, which ferments on the tree, carries trace alcohol and can cause mild stomach upset if you eat a lot at once.
Keep portions of very soft fruit modest, and consult a professional if you have a specific health condition or dietary restriction.
βοΈ Disclaimer
This calculator and article provide educational nutrition estimates for strawberry tree fruit to help with meal planning and draft product labelling. The figures are reconstructed from published values for the species and are not a laboratory assay of any particular fruit.
Nutrient content depends on cultivar, ripeness, growing conditions, storage and preparation, and real values will differ from these estimates. The reconstructed coefficients here should be checked against measured data before any commercial use.
Nothing here is medical or dietary advice. The tool cannot diagnose or treat any condition, including vitamin deficiency, and should not be used to make clinical decisions. Speak to a doctor or registered dietitian for personal dietary needs.
For nutrition labels sold to the public, verify all values with an accredited laboratory and follow your local food-labelling regulations. Consult a qualified professional or your local extension service before publishing nutritional claims or relying on this fruit for a specific health purpose.
