Free online tools for finance, health, dates, and everyday calculations

Smart calculators and tools, without the clutter

Toolzen helps you calculate faster with clean, modern tools for mortgages, salary, VAT, BMI, calories, time, and more.

Browse All Tools Try Mortgage Calculator

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Useful calculators

Finance

Salary, mortgage, VAT, loan, savings

Health

BMI, calories, water intake, ideal weight

Featured Tools

Start with some of the most useful calculators on Toolzen.

Add or remove VAT from any amount quickly and easily.

Discount Calculator

Calculate sale prices and discount savings in seconds.

Percentage Calculator

Work out percentages, increases, and percentages of values.

Calculate exact age from a date of birth.

Days Between Dates Calculator

Find the number of days between two dates.

Loan Repayment Calculator

Calculate monthly repayments, total repayment, and total interest.

Browse by Category

Explore tools by topic to find what you need faster.

Finance

Useful finance tools for quick, practical calculations.

Add or remove VAT from any amount quickly and easily.

Discount Calculator

Calculate sale prices and discount savings in seconds.

Loan Repayment Calculator

Calculate monthly repayments, total repayment, and total interest.

Everyday

Useful everyday tools for quick, practical calculations.

Percentage Calculator

Work out percentages, increases, and percentages of values.

Convert between common length and weight units.

Calculate your BMI from your height and weight.

Dates

Useful dates tools for quick, practical calculations.

Calculate exact age from a date of birth.

Days Between Dates Calculator

Find the number of days between two dates.

Built to be fast, simple, and genuinely useful

Toolzen is designed for people who want quick answers without confusing interfaces. Whether you are checking mortgage payments, tracking calories, or splitting a bill, the goal is the same: clean tools that save time.