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Estimating portions without a scale: your hand as the measure
A scale is the most exact, but life does not always happen next to a kitchen scale. Your hand and familiar objects are surprisingly reliable measures — and together with correcting a photo estimate, they are good enough for everyday logging.
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Why portion matters more than the food choice
Two spoonfuls of sauce can be 50 or 150 calories — same sauce, different amount. Most estimate errors come from portion size, not from identifying the food.
That is exactly why correcting matters as much as the estimate itself: the AI suggests a portion, but you know how big a plate you served yourself.
Your hand as the measure
A palm (without fingers) is roughly 80–120 grams of protein food — meat, fish, chicken. A fist is roughly a cup: rice, pasta, vegetables. A thumb is roughly a tablespoon: fats, sauces, nuts.
These are rough guides, not measurements — but they are always with you and good enough to set the portion in an estimate.
Familiar objects at home and in restaurants
Home measures: a tea glass is about 200–250 ml, a soup plate 300–350 ml, a coffee cup 150 ml. A yogurt pack and a bread slice are their own measures.
In restaurants: one bread slice, one medium potato, an egg-sized portion — familiar units you can use to correct a photo estimate even when the scale is at home.
How this works with a photo estimate
The photo estimate suggests grams; you correct them with what you know. If the plate holds a palm-sized piece of chicken, enter about 100 g. If the sauce is thumb-sized, enter a tablespoon.
A corrected rough entry beats an uncorrected guess — the point of logging is the trend and the pattern, not a single gram.
When the scale still wins
In baked goods, rich sauces and dense foods (cheese, nuts, chocolate) the eye errs the most — check those against a scale the first few times.
A couple of weeks of spot-checking calibrates the eye: after that, hand and photo are usually enough.
A routine that lasts
The most exact system is the one you actually use: a scale in the kitchen, a hand in the restaurant, photo plus correction everywhere. TempoLife accepts all three, whatever the moment needs.
Start with one thing: photograph, correct the portion, save. Accuracy comes with time; the habit comes immediately.
Frequently asked questions
How accurate are hand measures?
Rough, but useful: a palm is about 80–120 g of protein food, a fist a cup. Accurate enough to set the portion in an estimate — not a replacement for a scale when precision is critical.
Is logging even worth it without a scale?
Yes. A corrected rough entry beats no entry. The value of logging is in patterns and trends, not in a single gram.
TempoLife is a diary, not a medical device — estimates are for everyday awareness, not medical advice.
Prefer to read it?
The full written guide is above, and the original article — with its own formatting and links — is here: Estimating portions without a scale: your hand as the measure.
Source: TempoLife guide, last updated 2026-08-30 — read via your browser's Web Speech API · checked 2026-08-30
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