Free · Measurement and planning

Pretax Gratuity and Tax Total

Add supplied tax and a gratuity calculated on the pretax amount, with editable net, gross, tip and total amounts.

Calculator inputs

Loading calculator…

Enter the known values in the units shown. Results update as you type.
Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
Use the worked example to check the method. Reset restores the starting fields.

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

For the worked example, gross_price = 113.0000000, tip_amount = 15.00000000, total = 128.0000000.

Gross = net × (1 + tax); gratuity = net × tip; total = gross + gratuity.

Enter these known values and leave the other values blank.

Tip is calculated on the pretax price. Enter tax and tip as percentages; rates are supplied by you.
No jurisdictional tax rates or currency exchange rates are built in. Currency is a display denomination.
Results follow the stated ideal arithmetic model. Display rounding does not change the underlying calculation.
Supply sufficient known values and leave the desired quantity blank. Controls retain captured inverse branches and units.
If a retained lock prevents a reverse calculation, unlock the quantity you want to solve before supplying the known values.

Gross = net × (1 + tax); gratuity = net × tip; total = gross + gratuity.

Available selectors convert the entered physical quantity. Use compatible units for all related quantities.

A missing input, invalid denominator or underdetermined relationship cannot provide a unique finite result.

Use exact-sign physical domains, exact discrete counts where applicable, and documented model bounds. Source arithmetic is preserved.