Calculators
Percentages, margins, loans, dates, units and other everyday maths.
15 free tools · each done in 3 steps · nothing uploaded
Percentage CalculatorWork out X% of Y, what percent X is of Y, and the percentage increase or decrease between two numbers — three calculators on one page.Percentage Change CalculatorFind the percentage change between two values, apply a percent increase or decrease, or reverse a change to find the original value.Discount CalculatorCalculate the sale price with up to three stacked discounts, a fixed coupon and sales tax applied after the discount — see exactly what you save.Profit Margin CalculatorEnter any two of cost, price, profit, margin or markup and get the rest — gross margin, markup and profit solved instantly.Markup CalculatorCalculate selling price from cost and markup, the markup from cost and price, or the maximum cost for a target price — with margin shown alongside.VAT CalculatorAdd or remove VAT, GST or sales tax from any amount, with standard-rate presets for 29 countries (labelled to verify current rates).Compound Interest CalculatorProject savings growth with compound interest and regular contributions — any compounding frequency, yearly table, chart and CSV export.Loan Payment CalculatorCalculate monthly loan or mortgage payments, total interest and a full amortization schedule — see how extra payments shorten the loan. Export to CSV.Break-Even CalculatorFind how many units you must sell to cover fixed costs, the break-even revenue, contribution margin and units needed for a profit target — with a chart.Hourly Rate CalculatorConvert annual salary to an hourly rate or hourly pay to salary, with hours per week, weeks per year and overtime — plus daily, weekly and monthly pay.Date Difference CalculatorCount the years, months and days between two dates, plus total days, weeks and business days excluding weekends and your own holidays.Time Duration CalculatorCalculate the time between two clock times — even across midnight — minus breaks, or add and subtract durations like 1h 30m + 45m.Unit ConverterConvert length, weight, temperature, area, volume, speed, time and data units with exact factors, the formula shown and every unit listed at once.File Size ConverterConvert between bytes, KB, MB, GB, TB and KiB, MiB, GiB (decimal vs binary) and bits, and estimate download time at any connection speed.Time Zone ConverterConvert a time between any time zones with daylight saving handled, compare several cities at once and find meeting hours with a 24-hour planner.