How to convert tax inclusive and tax exclusive amounts

Jisuan 1.6.0 converts a plain amount without asking you to enter the tax rate or remember a formula each time. Sign in and save a default rate, enter an amount in a standard Chrome text field, then invoke Jisuan with your configured shortcut.

Save your usual rates

Open Tax rate settings in your account. Add a name, tax country or region, tax type, rate, and rounding precision. Optionally add a customer or purpose and an expiry date, then choose a default. Regional reference values are suggestions to review for your transaction. Changing the interface language does not change saved rates.

Choose the conversion direction

For an amount of 105000 at 5%, inclusive to exclusive gives 100,000.00; exclusive to inclusive gives 110,250.00. Click the corresponding button to write the result back into the original field. The existing 1, 2, and 3 choices still select result formats. Tax conversion uses its own buttons, with no new shortcut to memorize.

Actual Jisuan panel showing both conversion directions for 105000 at 5%.

Switch rates and keep them updated

Use the rate dropdown to search saved names, regions, customers, or rates. Manage tax rates opens your account directly at Tax rate settings. After adding, editing, deleting, or changing the default, return to the original field for automatic updates without signing out. The pinned panel and an open dropdown also refresh periodically. Synchronization never writes an amount automatically.

Free and Pro

Free saves 1 rate; Pro saves up to 50. Use names or the customer field to distinguish different business cases. Sign in first, set up a rate if none exists, and update expired rates. This feature handles a single proportional tax on one amount and does not replace an invoicing system. Divide the inclusive amount by 1 plus the rate, or multiply the exclusive amount by 1 plus the rate; results use the saved rounding precision.