Contact
Email hello@howmanyhours.com. Useful things to include: the page address (which contains what you entered), what you expected, and what you got.
Corrections
If a calculation is wrong, say which tool and paste the address — the entries are in it, so the case can be reproduced exactly. Every tool's method is on its page under "How this is calculated"; if the method itself is wrong, that is the most useful thing to point at.
Not handled here
Questions about a specific employer's overtime or leave policy, or about a time-tracking product listed on the comparison page — those go to the employer or the vendor.
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