Every calculator you actually need

Health, money, cooking, and everyday tools — all free, all accurate, available in 3 languages.

🩺 Health 💰 Finance 🍳 Cooking 📅 Daily 📐 Conversions
120+
Calculators
3
Languages
100%
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Health Calculators
BMI, calories, pregnancy and more
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BMI Calculator
Calculate Body Mass Index for adults. Metric and imperial units.
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Pregnancy Due Date
Estimated due date, trimester tracker and pregnancy milestones.
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Calorie Calculator
Daily calorie needs based on age, weight, height and activity level.
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Finance Calculators
Savings, interest, debt and budgeting
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Compound Interest
See how your savings grow over time with compound interest.
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Savings Goal
How much to save monthly to reach your financial target.
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Debt Payoff
Time and total cost to pay off any loan or credit card.
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Cooking Calculators
Recipe scaling, conversions and temperatures
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Recipe Scaler
Scale any recipe up or down to any number of servings.
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Cups to Grams
Convert cups to grams for 50+ common cooking ingredients.
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Oven Temperature
Convert oven temperatures between Celsius, Fahrenheit and Gas Mark.
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Daily Calculators
Age, tips, percentages and dates
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Age Calculator
Exact age in years, months, weeks and days from date of birth.
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Tip Calculator
Calculate tip amount and split the bill between any number of people.
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Percentage Calculator
Find percentages, percentage change, and what percent one number is of another.
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Why Calculoos?

Built for everyone — not just for experts. Clean results, no clutter, no sign-up required.

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Instant results

Results update as you type. No page reloads, no waiting.

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3 languages

English, Chinese and Spanish. Metric and imperial units automatically adjusted.

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Clear explanations

Every calculator explains what the result means and how the formula works.