Finance

Health

Math & data

Everyday

Tip splitter

Student pick · 10-point scale

Track your CGPA

Add every subject's grade point and credits — get your 10-point CGPA and equivalent percentage instantly.

Σ(Grade Point × Credits) ÷ Σ(Credits) Open calculator →

Most used · Finance

Calculate a percentage

Percent of a number, a percent change, or what share one value is of another — answered as you type.

(X ÷ 100) × Y Open calculator →

Quick check · Health

Track your age

The exact years, months and days between any two dates — handy for forms, eligibility and milestones.

(Today − DOB) → Years, Months, Days Open calculator →

Health check · Instant

Check your BMI

Enter your height and weight to get your body mass index and see which category it falls into.

Weight(kg) ÷ Height(m)² Open calculator →

Plan ahead · Finance

Work out your EMI

See the monthly payment, total interest and total payout on any fixed-rate loan before you sign.

P × r(1+r)ⁿ ÷ ((1+r)ⁿ−1) Open calculator →

Everyday · Finance

Add or remove GST

Go from a base price to a tax-included price, or pull the tax back out of a total — either direction.

Price × (1 + GST%) Open calculator →

All tools About

Onlinecalculatorworks

Contact Us

Dear user,
This site is built for you, so if something's missing or could be better, we want to know. Need a calculator we don't have yet? Spotted a formula that looks off? Want an existing tool updated with a new feature? Just write in — every message is read, and real requests shape what gets built next.

Have a question, found a bug, or want to suggest a new calculator? We'd like to hear from you.

Email us

The fastest way to reach us — we read every message.

[email protected]

Before you write in

If you spotted an incorrect result, it helps to include the calculator name and the exact numbers you entered — that way we can check the formula against your example directly.