CALC7 tools
Free online calculators
Everyday sums without a spreadsheet. Work out a percentage or a percentage change, the price after a discount, profit margin and markup, and VAT or GST added to or taken out of a price. Find someone’s exact age, count the days between two dates or add days to a date, and convert lengths, weights, temperatures and more. Every calculator runs in your browser and updates as you type.
Percentage calculatorPercent of, change, increaseDiscount calculatorSale price, savings and taxProfit margin calculatorMargin, markup, cost and priceVAT & GST calculatorAdd or remove VAT and GSTAge calculatorExact age in years, months and daysDate calculatorDays between dates, add or subtractUnit converterLength, weight, temperature and more
Frequently asked questions
Are these calculators free?
Yes, completely free with no sign-up and no limits.
Are my numbers sent anywhere?
No. Every calculator runs in your browser, so the figures you enter stay on your device.
How accurate are the results?
Results are calculated to full precision and rounded only for display, to two decimal places for money. Check important tax or financial figures with an accountant.