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The fastest way to reach us is by email:

What to include

  • A calculator result that looks wrong: the page address, the numbers you entered, the result you got and the result you expected.
  • A correction to a guide: the page, the statement and a source that shows the right information.
  • A new calculator idea: what you are trying to measure and the units you work in.
  • Partnerships or advertising: your company, your website and what you have in mind.

Before you write

We cannot measure your property, give professional advice or confirm figures for an appraisal, a sale or a lease. For those, talk to a licensed appraiser, architect or contractor. Read more in our disclaimer.

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