Backing saves you money in a practical way.

Instead of filling your entire spool with expensive braid or fluorocarbon, you fill most of it with cheaper backing. Then you put your premium line only on the top section — the part you actually cast and use, plus a little extra for reties.

That means a 200-yard spool of high-end line can fill multiple reels, or let you re-spool the same reel more than once.

The money you save can even allow you to step up to a more premium line without increasing your overall cost.

Less waste. More value. Better line where it actually matters.

ReelCalc is a simple calculator using the specs/info of your reel and fishing line to fill your spool perfectly with backing and your “main” line.

If you have filled your reel with backing before, maybe you have experienced…

• Too much backing.

• Not enough main line.

• An unusable amount of expensive line going to waste.

ReelCalc takes the guesswork out.

It tells you:

• How much backing to use with your chosen main line and amount.

• How to fill your spool right the first time

Just simple math that gets it right to save time, money, and line.

If you only spool a reel once in a while, you might not care. But if you run multiple setups or change line often, it adds up.

Simply fill in the calculator shown on any page and get results instantly. Use the information tabs to help along the way or check out our How To Use page.

Yes. 100% free with unlimited calculations. ReelCalc was made to help anglers save money, not spend more.