Work out zipper length instantly with clear inputs, formula shown and shareable results.
Zip length is the opening plus ease plus an allowance that depends on type, since invisible zips need extra above the opening for the pull to clear. Zips are only sold in standard lengths, so rounding up and shortening from the top is normal practice rather than a compromise.
Zip length
length = opening + ease + type allowance
length = opening + ease + type allowance. Zip length is the opening plus ease plus an allowance that depends on type, since invisible zips need extra above the opening for the pull to clear.
Zips are only sold in standard lengths, so rounding up and shortening from the top is normal practice rather than a compromise.
Enter opening length, ease to add, zip type. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.