Jisuan — Calculate right where you type.

Calculate amounts, tax, dates and ratios in Chrome web fields.

Download for macOS Tutorial

Notarized by Apple
On-device
Private

A. Free core calculationsAlways-free essentials

Free

#ScenarioTest inputWrite-back value

F01Addition and grouping=12580+369016,270

F03Multiplication=100*909,000

F06Thousands in calculations=36*1000+850044,500

F10Date across months2026-09-15 + 45d2026-10-30

B. Pro finance calculationsProfessional finance expressions

Pro

#ScenarioTest inputWrite-back value

P01Calculate net from gross108000 incl. 8% tax100,000.00

P04Add tax to net100000 net + 8%108,000.00

P06Year-over-year growthThis year 1.26m / last 1.05m20.00%

P07Completion rateTarget 1.2m, completed 930k77.50%

Jisuan panel with number formats, a saved 5% tax rate, and tax-inclusive and tax-exclusive conversion buttons

1 / 2

1Type an expression in a web field
2Press ⌘⌥=
3Choose a result and write it back

Supportedweb input scenarios

Jisuan calculates beside the current HTML field.A confirmed candidate is written back to that same field.Save calculation results to an encrypted local ledger and organize income and expenses by category.

No separate calculator, and no need to leave the page.Password, read-only and secure inputs are refused.

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Jisuan — Calculate right where you type.

Supportedweb input scenarios

Split tax

Completion rate

Use templates

Runs locally

Decimal precision

Confirm before writing