Instrument 01 · The command line

Numbers, solvedwithout the fuss.

46 working calculators for money, bodies, calendars and the kitchen, plus local tax tools for six countries. Instant, free, never behind a sign-in.

46
working tools
No account
nothing stored
Instant
on-device maths
Colorful friendly calculator illustration
Fig. 01 — precision in glass
Most used this month
View directory →
Six sections

Browse by category

Local rates applied

Calculators by country

All regions →

Tax rates are local, so these tools use each country’s own GST or VAT rate, income tax bands and currency.

Freshly calibrated

Recently added

The full index

All calculators

Filter & search

Every tool in the workshop, grouped by section. Scan the list, or jump straight to a section from the navigation above.