Power Meter Multiplier & Doubler - Fix Half-Power Telemetry
Did your single-sided power meter record only left-leg watts without doubling? Multiply watts across the entire file and restore true cycling power.
How to Use Power Doubler & Offset in 3 Simple Steps
Step 1: Upload
Drag & drop your .FIT, .GPX, or .TCX activity file. All processing is 100% private in your browser.
Step 2: Process
FitCrop inspects telemetry streams, removes anomalies, recalibrates metrics, or fixes binary checksums.
Step 3: Export
Download your clean Strava, Garmin, and Zwift compatible file with 1 click. Zero server wait.
Frequently Asked Questions
Why did my power meter record only half watts?
Single-sided cranks (Stages, 4iiii, Favero Assioma Uno) measure left leg force and double it. A firmware glitch or pairing mode error can cause it to output raw single-leg power.
Can I apply custom wattage offsets to fix miscalibration?
Yes, you can multiply by any decimal factor (e.g. 2.0x, 1.05x) or add/subtract fixed wattage offsets across every trackpoint.