Split a restaurant bill
Share one meal bill equally, including an additional service charge. Use the settlement tool instead when people ate different amounts or paid in advance.
Food and shopping calculators
From shopping comparisons and shared meals to recipe scaling, choose a tool matching your data and keep denominators consistent.
Which tool fits this question?
For one discount use the discount tool; for coupons, rewards and shipping use the coupon tool. Use group settlement when someone paid in advance or shares only some expenses. Scale known ingredient weights with recipe scaling; work backward with flour at 100% using baker's percentages.
- Which set has the lower unit price when sizes, package counts and offers differ?
- How do we settle when people paid in advance and participants differ by expense?
- How many grams of each ingredient make my target dough weight?
Volume is not weight. Cups, spoons and milliliters cannot be treated as grams without knowing the ingredient and vessel. Fermentation and cooking time do not necessarily scale proportionally.
Food and shopping · 11 tools
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Coupons and cashback
Separate what you pay now from rewards you may receive later. Choose one discount or two successive discounts with a cashback cap.
Subscription cost
Compare monthly, quarterly and annual subscriptions on the same monthly basis. You can also divide an average cost among several people.
Discounted price
Find a sale price from a price multiplier, or work backwards from an actual item payment. The multiplier follows the Taiwan out-of-ten discount notation.
Compare unit prices
Compare package offers using the same weight, volume or item unit. Enter the complete promotional set rather than the price of just one package.
Group expense settlement
Settle shared expenses when people paid different amounts or have different shares. Choose either each person's total paid or an itemized expense list.
Scale recipe quantities
Scale an ingredient list by servings or by the amount of one ingredient available. Select a reference ingredient from your list when working backwards.
Recipe ingredient cost
Allocate the cost of ingredients actually used in a recipe. Enter each package price, total package quantity and the quantity used.
Cake tin and recipe scaling
Scale an ingredient amount by the relative filled volume of two straight-sided tins. Measure the intended batter fill height, not just the tin's outer height.
Mix beverage concentrations by mass
Find how much of two beverage mixtures to combine for a target mass concentration. All concentrations must describe the same dissolved substance.
Baker percentages and dough weight
Build a dough formula from total weight and baker percentages. Flour is the 100% reference, rather than the entire dough.