Run the numbersbefore you switch

Free calculators for speed, data, coverage and the real cost of an offer. Each one shows its assumptions, and nothing you type leaves your browser.

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12 free calculators

Pick a calculator

Each one shows its assumptions, so you can see exactly how the answer is worked out.

How our calculators work

Honest numbers, shown in the open

  • Private by designEverything is worked out on your device. No sign-up, and nothing you type leaves your browser.
  • Assumptions on the pageEvery calculator lists the rates and formulas it uses, right under the result, so you can check them.
  • Estimates, not quotesUse the answer to plan and compare. Confirm the final price, taxes and terms with the provider before you sign.

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