All calculators
Showing 20 of 20 calculators
Percentage Calculator
Five percentage calculations in one place, with the answer explained in plain English.
Open toolBMI Calculator
Work out your body mass index in kilograms or pounds, and see what the number does and does not tell you.
Open toolAge Calculator
Turn a date of birth into an exact age in years, months and days - as of today or any date you choose.
Open toolDiscount Calculator
Find the sale price, the amount saved, or the discount percentage behind a price cut.
Open toolTip Calculator
Work out the tip, the total and what each person owes when the bill is split.
Open toolGPA Calculator
Add each course's grade and credit hours to get your credit-weighted GPA - letter grades or any numeric scale.
Open toolLoan Calculator
Find the monthly payment on a loan, and see how much of it is interest rather than principal.
Open toolEMI Calculator
Work out your equated monthly instalment, and how much of the total is interest.
Open toolCompound Interest Calculator
See how savings grow when interest earns interest - with or without regular contributions.
Open toolVAT / GST Calculator
Add tax to a price, or pull it back out of a price that already includes it - using the right tax name and currency for your country.
Open toolUK VAT Calculator
Add or remove UK VAT - 20% standard rate pre-filled, with 5% and 0% one tap away.
Open toolIreland VAT Calculator
Add or remove Irish VAT - 23% standard rate pre-filled, with every reduced rate one tap away.
Open toolSouth Africa VAT Calculator
Add or remove South African VAT - 15% standard rate pre-filled.
Open toolUAE VAT Calculator
Add or remove UAE VAT - 5% standard rate pre-filled, in AED.
Open toolAustralia GST Calculator
Add or remove Australian GST - 10% rate pre-filled, both directions.
Open toolSingapore GST Calculator
Add or remove Singapore GST - 9% rate pre-filled, in SGD.
Open toolUAE Gratuity Calculator
Work out UAE end-of-service gratuity from the last basic salary and years of service, with the 21-day and 30-day rates split out.
Open toolGCC VAT Calculator
Pick a GCC country and add or remove VAT at its current standard rate - UAE, Saudi Arabia, Bahrain and Oman, all in one place.
Open toolScientific Calculator
Type a whole expression and get the answer, with brackets and order of operations respected.
Open toolSalary Increase Calculator
Work out a raise percentage, a new salary, or what several raises in a row actually add up to.
Open toolEvery calculator here is free to use, needs no account, and gives you the answer as you type rather than after a page reload. They are grouped by the situation you are in rather than by the branch of maths involved, because most people arrive with a question, not a formula.
Each one also explains its result. A number on its own is easy to misread - a percentage increase is not a percentage difference, and a low monthly loan payment is not a cheap loan - so every calculator shows the working alongside the answer.
Free money and finance calculators
The finance calculators are built around one idea: the monthly figure is not the important number. A longer loan term always lowers the payment and always raises the total cost, so each of these shows both.
- The free loan calculator gives the monthly payment, total interest and total repayment for any amount, rate and term.
- The free EMI calculator does the same for equated monthly instalments, and explains the difference between reducing-balance and flat-rate interest.
- The free compound interest calculator shows how savings grow with monthly, quarterly or yearly compounding, with optional regular contributions.
- The free discount calculator works out a sale price and your saving, and can work backwards from two prices to the real discount percentage.
Free everyday and study calculators
- The free percentage calculator covers five distinct calculations, including percentage increase, percentage decrease and percentage difference.
- The free scientific calculator takes whole typed expressions with brackets, trigonometry, logarithms and powers, in degrees or radians.
- The free tip calculator works out the tip and splits the bill between any number of people.
- The free age calculator turns a date of birth into an exact age in years, months and days, as of today or any date you choose.
- The free BMI calculator works in metric or imperial and shows the healthy weight range for your height.
Why these calculators are free
There is no account, no trial and no paid tier. The calculators run entirely in your browser, which means they cost almost nothing to serve and there is no reason to put them behind a sign-up form.
It also means nothing you type is transmitted anywhere. Your salary, your loan balance and your weight are calculated on your own device and are gone when you close the tab.
Frequently asked questions
Are all these calculators really free?
Yes. Every calculator on VSThiran is free, with no sign-up, no trial period and no usage limit.
Do I need to create an account?
No. There is nothing to register for. Open a calculator and use it.
Do these calculators work on a phone?
Yes. Every calculator is built for touch first, with keypads sized for thumbs and layouts that work on a narrow screen.
Is my data private?
The calculations happen in your browser, so the figures you enter are never sent to our servers. Nothing is stored once you close the tab.
Do they work offline?
Once a calculator page has loaded, it keeps working without a connection, because all the maths runs locally.
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Convert images to PDF, turn PDF pages into images, merge several PDFs or split out the pages you need.
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Create an invoice, a quotation or a receipt and download it as a clean A4 PDF.
Free unit converter
Convert length, weight, temperature, volume, area, speed, data and time between metric and imperial.
Free QR code generator
Make a QR code for a link, Wi-Fi network or contact card and download it as PNG or SVG.