---
title: "Tools"
url: "https://timeretain.com/tools"
description: "Free browser tools for freelancers and consultants who check work hours, rates, and invoice totals without uploading their data."
---

# Tools

Free browser tools for checking work hours, rates, and invoice totals. Your data stays on your device.

-   [Billable hours calculator Paste or upload a timesheet to see billable hours and the amount. Your data stays in your browser.](/tools/billable-hours-calculator)
-   [15 minutes on a timesheet 15 minutes on a timesheet is 0.25 hours, not 0.15. Convert minutes to decimal hours, tenths, and quarter hours. The numbers stay in your browser.](/tools/15-minutes-on-timesheet)
-   [Freelance rate calculator: check consulting quotes Calculate your freelance hourly rate, then check a consulting fee against planned hours and extra revisions. See when the fee falls below your target rate.](/tools/freelance-rate-calculator)
-   [Study time calculator: will your plan fit? Check whether your remaining study work fits before the deadline. Set your hours, available days, and daily time limit. No account needed.](/tools/study-time-calculator)