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The form on this page delivers your message to DIY Totals by email. Use it to flag a figure that looks wrong, to suggest a calculator or a material to add, or to raise a privacy question or make a request about your data.
The clearest corrections name the page, the figure you expected, and the figure you saw. Those three details are enough to identify the right entry and correct it. Suggestions are just as useful when they name a material or a project type. After you send the form, DIY Totals receives an email with your message, and an automatic confirmation goes to the address you gave. Replies typically arrive within a few days.
How do I report a wrong figure or bad result?
Use the form on this page. Include the page you were on and the figure you expected alongside the figure you saw. That lets the site find and correct the entry.
How do I suggest a new calculator or material?
Use the form and name the material or project type you want. Project types are as useful as material names, so include both if you can.