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Overview
With PVB Contact Form 7 Calculator, you can easily turn any Contact Form 7 form into a calculator. Calculated fields are based on user input and selections in other parts of the form. The plugin can be used for creating various types of calculators, such as an ideal weight calculator, calorie calculator, quote calculator for hotel booking, car rental quote calculator, mortgage calculator, tax calculator, finance calculators, date calculator, etc.
Features
- Advanced calculations – set your custom formula based on user input, for example:
cost_per_day * days * (1 + (tax_percentage / 100)) - Hide calculated fields – they can be visible to the user or not. Your choice!
- Server-side calculation – you don’t have to disclose your top secret formula! Calculations are performed behind the scenes, on the server.
- Calculate on button click – you can let your users trigger the calculations without submitting the form.
- Calculate on submit – values are always calculated on submit, so you can use them in your notification emails.
- Calculate on other events – you can also trigger calculations from another script at any time!
- Correct floating-point math – PVB Contact Form 7 Calculator handles decimal floating-point math properly, unlike many online calculators that introduce rounding errors when converting to binary and back, yielding incorrect results (such as 0.6 + 0.3 = 0.8999).
Video tutorial
Screenshots

Loan calculator

Booking calculator

Ideal weight calculator
Plugin Details
Active Installs
600Total Downloads
25,790Version
1.1.0Requires WP
6.5Requires PHP
7.4Tested Up To
7.0.4Added
2018-03-09Last Updated
2026-05-20 1:18pm GMTRatings
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