REM calculator for Webflow

Name: REM calculator for Webflow
Author: kobro

Convert PX values to REM units in Webflow with custom base width. Press space to transform values in width, margins and etc.

As of May 2026, REM calculator for Webflow has 166 users in the Developer Tools category.

kobro Developer Tools★ Featured

Chrome Web Store ↗.crx

Users+16.9%

166

Rating0%

—

— reviews

Reviews0%

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Version

0.1.0

Manifest V3

History

3 snapshots

Tracking since Apr 1, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 1, 2026	142	—	—	0.1.0
Apr 29, 2026	144	—	—	0.1.0
May 26, 2026	156	—	—	0.1.0
Now	166	—	—	0.1.0

Permissions & access

Permissions: storageactiveTabscripting
Host access: https://*.webflow.com/*

Screenshots

About

Calculate px to rem inside Webflow designer.
Before start, make sure you have embed code: html { font-size: 1vw; }

HOW TO USE:
1. Enter base width in px of your design or select width options.
2. In input like margin, padding, width, height, etc.. enter number in PX and press 'Space' key.
3. Get REM size in your input.

(PX size / PX base width) * 100 = REM