Calculators

Browse Calculator Categories

Jump directly to a calculator category or browse the full collection below.

Find the Right Calculator for Your Calculation

Online calculators can make everyday calculations faster and easier by handling the underlying formulas for you. Instead of working through a formula manually, you can select a calculator designed for the specific problem you are trying to solve and enter the relevant values.

The YesTools calculator collection covers a broad range of use cases. You can calculate percentages and fractions, compare dates, estimate loan and mortgage repayments, work out business margins, convert units, calculate geometric measurements and explore scientific formulas.

Everyday and Mathematical Calculations

General and mathematical calculators are useful for common numerical tasks as well as more advanced problems. Percentage, fraction, ratio, average, square root, exponent, algebra, statistics and trigonometry calculators can help with calculations involving numbers, equations and mathematical relationships.

Financial and Business Calculations

Financial calculators can help with interest, loans, mortgages, investments, savings, debt and returns, while business calculators cover areas such as revenue, profit, margins, pricing, customer acquisition and break-even analysis. These tools are intended to make common financial formulas easier to work with.

UK-Focused Calculations

The UK-specific calculator collection includes tools for common tax, salary and employment calculations. These include VAT, income tax, National Insurance, take-home pay, pensions, student loan repayments, Stamp Duty and other UK-related figures.

How to Use an Online Calculator

Most calculators follow a simple process. Select the tool that matches your calculation, enter the required values and review the result.

1. Choose a calculator — Find the calculator that matches the calculation you need.
2. Enter your values — Provide the numbers, measurements or other inputs requested by the calculator.
3. Check the calculation — Review the formula inputs and units before relying on the result.
4. Use the result — Apply the calculated value to your task, project, comparison or decision.

Calculator Results and Accuracy

Calculator results depend on the information entered and the formula used by the particular calculator. Check that values, units, dates and other inputs are correct before using a result.

Some calculations can also depend on assumptions, rounding methods, tax rules, financial terms or other external factors. For important financial, tax, health, legal or engineering decisions, calculator results should be treated as estimates where appropriate and verified against authoritative information or professional advice.

Frequently Asked Questions