Battery Cost per Wh Calculator

Which pack is better value?

Wh = volts × amp-hours. Everything is worked out in your browser. Nothing is saved or sent anywhere.

1. Pack A

2. Pack B

3. Results

How it was worked out

    What this does and doesn't tell you

    • Genuine packs and cheap copies can differ a lot in real capacity and protection.
    • Lithium-ion tool packs can short, overheat and catch fire if they're damaged, wired wrongly or charged on the wrong charger. Only use the maker's charger for the pack.
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