Numbers, made clear
Calculators
16 free calculators for everyday numbers, loans, business and work. Choose a tool, enter your values and see the calculation in your browser.
Everyday & dates
Percentage calculator
Find a percentage of a number, express one value as a percentage of another, or calculate a percentage change.
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Age calculator
Calculate age in calendar years, months and days on any reference date.
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Date calculator
Find the number of days between dates or add and subtract calendar days.
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Working days calculator
Count working days between dates with your working week and a custom list of holidays.
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Loans & savings
Loan calculator
Estimate monthly loan payments, total interest and the full repayment schedule.
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Loan amortization calculator
See how each monthly payment is split between principal and interest until your loan is repaid.
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Mortgage calculator
Estimate a fixed-rate home loan from the property price and down payment, including optional monthly housing costs.
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Early repayment calculator
Compare a regular loan with extra monthly principal payments and an optional lump sum paid immediately.
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Compound interest calculator
Project savings growth with an initial amount, monthly contributions and a selected compounding frequency.
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Business & pricing
VAT calculator
Add or remove VAT with a rate you enter and see the net amount, tax and gross total.
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Margin calculator
Find a selling price from cost and a target profit margin, and compare it with markup.
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Markup calculator
Find a selling price from cost and markup, and see the corresponding profit margin.
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Profit calculator
Estimate revenue, costs, profit and the break-even quantity from your unit economics.
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Salary & freelance
Salary calculator
Convert gross pay between annual, monthly, weekly and hourly amounts using your paid weeks and working hours.
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Hourly rate calculator
Find an hourly rate from your annual gross income target and paid working hours.
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Freelancer rate calculator
Build an hourly freelance rate from income, expenses, time off, billable time and a profit buffer.
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Looking for asset depreciation?
Loan amortization repays a debt. Accounting depreciation spreads the cost of an asset over its useful life. Our existing asset calculator is available separately.
Open asset depreciation calculator