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Razor Blade Replacement Calculator
Find out how often to replace your razor blade based on shave frequency and blade type.
How many times per week you shave.
The type of razor blade you use.
Coarser hair dulls blades faster. If your stubble feels rough like sandpaper, you are likely coarse.
A larger shaving area means more blade wear per shave.
About This Tool
A dull razor blade is one of the most common causes of razor burn, ingrown hairs, and a bad shave. This razor blade replacement calculator tells you exactly how many shaves per blade to expect and when to swap based on your blade type, hair thickness, and shaving area. Struggling with irritation? Take our Razor Burn Risk Checker to diagnose the full problem.
How to Use
Enter shaves per week, blade type, hair thickness, and shaving area. The calculator returns shaves per blade, change frequency, annual blade count, and estimated yearly cost. Pair this with our Razor Burn Risk Checker and Skincare Routine Builder for a complete shaving and skin care plan.
FAQ
How do I know when a blade is dull?
Three clear signs: tugging instead of gliding, needing multiple passes for a clean shave, and increased nicks or irritation. A sharp blade cuts on the first pass with almost no pressure. If you press harder, the blade is done. For shaving technique improvements, our Razor Burn Risk Checker evaluates your full routine.
How can I make my blades last longer?
Rinse the blade thoroughly after every few strokes. Pat dry after use rather than leaving it wet, since moisture causes oxidation. Store your razor upright in a dry area, not in the shower. Some men run the blade backward along denim to realign the edge. Our Skincare Routine Builder includes post-shave care that also protects your skin.
Are expensive blades worth the price compared to safety razors?
From a cost perspective, safety razors win by a massive margin. Double-edge blades cost 10-25 cents each versus $2-5 per cartridge. They also provide a closer shave with less irritation once you learn the technique. If you spend over $100 a year on cartridges, a safety razor pays for itself in months.
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