Free online calculators for money, work and everyday numbers

Calculators that show their working

Dailycaltor is a collection of free online calculators for the numbers that come up at work and at home. You can add or remove VAT on an invoice, turn a gross salary into monthly take-home pay, price a product for the margin you want, check how many sales you need to break even, or see what a mortgage will really cost over 30 years.

Each calculator sits on its own page with a plain explanation underneath: the formula it uses, a worked example with real numbers, and answers to the questions people ask most. You get the answer straight away, and you can see exactly how it was reached.

Built for speed and privacy

Every result updates the moment you change a number. There are no buttons to press and no pages to reload. The calculations run on your own phone or computer, so the figures you enter, including salaries, loan amounts and anything you paste into the word counter, are never uploaded to our servers.

Money and tax calculators

The VAT calculator adds or removes VAT at any rate and handles income tax withholding and equivalence surcharge. The gross to net salary calculator converts yearly, monthly or hourly pay into take-home pay using your own tax rates, so it works in any country. To plan ahead, the compound interest calculator with monthly deposits shows how savings grow, and the mortgage payment calculator gives your monthly payment with a full amortization schedule.

Work, payroll and everyday US tools

For work and pay, the time card calculator adds up weekly hours with unpaid lunch breaks, the overtime calculator shows what time-and-a-half is worth, and the hourly to salary calculator converts a wage into every pay period. At the register, the sales tax calculator adds state and local tax or works backward from a receipt, and the discount calculator handles stacked sale prices. For dates, try the date difference calculator and the age calculator, and for pet budgets the pet cost calculator.

Business calculators

The profit margin calculator shows gross margin and markup side by side and works out the selling price for a target margin. The break-even point calculator tells you how many units you must sell to cover fixed costs and reach a profit goal.

Everyday math and health

The percentage calculator covers the four percentage questions people ask most, from discounts to pay rises. The tip and bill split calculator divides a restaurant bill between friends. Writers and students use the online word and character counter to check essays and social posts. The daily calorie calculator estimates your energy needs, BMI and a balanced macro split.

Available in six languages

Dailycaltor is also available in Hindi, Spanish, French, German and Brazilian Portuguese. Each version is adapted to local rules and terms, such as GST in India, IVA in Spain, TVA in France, MwSt in Germany and INSS in Brazil. Use the language menu at the top of any page to switch.

How we keep results accurate

We use standard, widely published formulas and explain each one on its page. Inputs are checked so that impossible values give a clear message instead of a misleading number. Tax, loan and health results are estimates, so confirm important decisions with an accountant, lender or doctor.

Popular calculations

• Find the price before sales tax from a receipt total
• See what $25 an hour is as an annual salary
• Add up weekly hours with a 30-minute unpaid lunch
• Work out time-and-a-half for 6 overtime hours
• Count the business days until a deadline
• Estimate the lifetime cost of owning a dog
• Compare a 15-year and a 30-year mortgage payment
• See what $200 a month grows to in 20 years