Calculator
Everyday maths without opening a spreadsheet.
16 tools
Solve the CPM triangle in any direction, then add clicks and conversions for CTR, CPC, CPA and ROAS.
Work out price, cost or margin from the other two — and see the markup beside it, because they are not the same number.
Paste a list of numbers, separated however you have them, and get the whole descriptive summary including outliers.
Resting energy, daily maintenance and a target for the rate you want — with the floor a diet should not go below.
Calculate exact age from a date of birth.
The fourth number when you know three — and the name of the ratio you are actually working in.
Body mass index with the cut-offs that apply where you live — the international bands and the lower Asia-Pacific ones disagree, and the difference is a whole category.
What savings become over time, with contributions — and how much of the result is interest rather than your own money.
How long between two dates — with the off-by-one named rather than assumed, and weekends counted separately.
Find the final price after a discount.
Work out the monthly payment, the total interest, and where every instalment goes.
Work out percentages, increases and differences.
Gross to net and back, with insurance, deductions and every tax band shown — and the rates left editable, because they change.
Add up hours and minutes without getting 21:90 — and get the decimal total payroll asks for.
Which pack is actually cheaper, once everything is priced per kilo, per litre or per piece.
Add tax to a price, or take it back out of one that already includes it — the direction most calculators get wrong.