Compute ideal sleep bedtimes counting back in 90-minute cycles — whole and half-cycle rows (2 to 5 cycles) minus a 15-minute buffer. Wake refreshed at cycle ends, not mid-dream — free, local, no signup.
Build age-appropriate baby sleep schedules — naps, bedtimes, wake windows. End the 5am party phase with structure — free, local, informational only.
Compute keto daily calories (TDEE minus 500) with protein at 1.8g/kg and fixed 20g net carbs, fat filling the rest. Hit ketosis without math errors — free, local, informational only.
Compute running pace and speed from distance and time in km or miles. Check splits for a 5K tune-up — free, local, no signup.
Compute net worth from total assets minus total liabilities. Track the number that actually matters yearly — free, local, no signup.
Parse SQL INSERT statements back into CSV rows — quoted strings unescaped, NULLs emptied, multi-statement appends. Round-trip database dumps back to spreadsheets — local parsing, free, no signup.
Sleep runs ~90-minute REM/non-REM loops; waking at cycle ends avoids grogginess. Count back in 90s from alarm plus 15 min to fall asleep.
The tool lists 2 to 5 cycles in half-cycle steps (2, 2.5, 3, 3.5, 4, 4.5, 5 — i.e. 3–7.5 hours), each 90 minutes times cycles plus a 15-minute buffer: a 06:30 alarm with 5 cycles means a 22:45 bedtime. Prefer whole-cycle rows; half-cycle rows split a 90-minute loop.
20 minutes (no deep sleep) or 90 full cycles — 40–60 minute naps wake mid-cycle groggy. Time naps deliberately.
No — math runs locally in your browser. Nothing leaves your device.
Last updated October 2026