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Precise calculators, an AI tutor that teaches maths and physics, and smart tools for pricing and running a business — in four languages, free for everyone.
FREE · NO SIGN-UP · NO SUBSCRIPTIONPopular calculators
Every result is computed by tested, deterministic maths — never guessed by AI.
Budget variance calculator
Compare actual with budget and see whether the variance is favourable or unfavourable.
Inflation calculator
What things may cost in the future and how much buying power money loses at a steady inflation rate.
Break-even calculator
Find how many units you must sell to cover your fixed costs, and how many to reach a profit target.
Cash flow projection
Project month-by-month cash balance from inflows, outflows and growth rates.
Cost of goods sold (COGS) calculator
Work out COGS from opening inventory, purchases and closing inventory, and optionally gross profit.
Contribution margin calculator
Find how much each sale contributes towards fixed costs and profit.
Depreciation calculator
Straight-line or double-declining depreciation with a year-by-year schedule.
Discount calculator
Find the sale price and savings after one or two percentage discounts.
Muhasaba Pro business applications
Professional software for accounting and business management. Release status is always shown honestly.
Free, always
Every calculator and the AI education platform are free. You never need an account, a subscription or a payment to use them.