Privacy policy
Last updated
Calculator inputs stay on your device
Calculations run in your browser. The figures you type into a calculator are saved to that browser’s local storage so your work survives a refresh, and they are not transmitted to us.
We store anonymous calculator input on our servers only when you explicitly choose to save or share a calculation. Clearing your browser storage removes anything held locally.
Accounts
Accounts are optional and no calculator requires one. If you create an account, we store the email address you sign in with and any profiles, scenarios or quotes you choose to save. You can export or delete all of it at any time from your account settings, and deleting your account removes it permanently.
Analytics and cookies
We use a small number of strictly necessary cookies, including one that remembers your light or dark theme preference. These carry no personal information.
Where analytics or advertising cookies are used, they are disclosed and controlled through the consent options on this site, and they are not loaded before you have made a choice. We do not send the values you enter into a calculator to any analytics provider.
Advertising and affiliate links
This site carries advertising and affiliate links. When you follow an affiliate link and make a purchase, we may earn a commission at no additional cost to you. Affiliate placements are labelled wherever they appear, and they never affect a calculator’s output.
Your rights
You can request a copy of any personal data we hold about you, ask for it to be corrected, or ask for it to be deleted. Account holders can do all three directly from account settings. For anything else, contact us and we will respond within 30 days.