Unix Epoch Timestamp Converter
Live parser for Unix timestamps, millisecond formats, and ISO human calendars.
1. Convert Epoch to Human Date
2. Convert Date to Unix Epoch
Explore Additional Utilities
Precipitation Unit Converter
Convert rainfall and precipitation depth between millimeters, inches, and liters per square meter.
One Rep Max (1RM) Calculator
Estimate your single repetition maximum lifting capacity (1RM) using major clinical lifting models (Epley, Brzycki, Lander).
Gray ↔ rad (Absorbed Dose)
Convert between Gray (Gy), rad, milligray (mGy), and microrad (µrad) to analyze absorbed ionizing radiation energy per unit mass.
Body Surface Area (BSA) Calculator
Calculate body surface area (BSA) for clinical dosing using Mosteller, DuBois, Haycock, and Gehan-George formulas.
Legal Billable Hours Estimator
Convert word count of legal drafting documents to estimated billable hours based on complexity and billing rates.
Water discount — full water ↔ reduced water ratio
Optimize water discount levels and water-to-lye concentration ratios to speed up soap curing.
Wind Chill Calculator
Determine the feels-like wind chill index from ambient air temperature and wind speed.
Saponification value — oil type ↔ lye required per gram
Look up sap values for standard oils and calculate custom lye weights.
Fold ratio — paper thickness ↔ maximum folds possible
Compute theoretical limit of fold iterations possible for paper size and thickness (Britney Gallivan equation).
Yarn Weight Converter
Convert yarn sizes across WPI (Wraps Per Inch), ply, and standard weight categories.
Varroa mite load — alcohol wash count ↔ treatment threshold
Input alcohol wash or powdered sugar shake counts to analyze parasite load percentage and check treatment recommendations.
Pipe Flow Rate Calculator
Calculate water flow rate, velocity, and capacity under gravity or pressurized nozzle flow.
IV Drip Rate (Drops/min ↔ mL/hour)
Convert IV flow rates between mL/hour and drops/minute (gtt/min) for any drop factor, with real-time dripping rate animation.
Tidal current ↔ drift
Calculate course to steer and speed over ground (or set and drift) to compensate for tidal current and wind leeway.
Battery capacity — Ah ↔ Wh ↔ days of autonomy
Convert between Amp-hours (Ah) and Watt-hours (Wh) and calculate battery bank backup days of autonomy based on loads.
Water resistance — ATM ↔ bar ↔ meters depth rating
Convert water pressure tolerances across ATM, Bar, and depth meters. Understand safe real-world water sport activities.
MAC address formats — colon ↔ hyphen ↔ Cisco notation
Convert physical MAC addresses between IEEE colon, hyphen, Cisco dot format, and raw hex strings.
Cure time — soap thickness ↔ days to harden
Forecast recommended bar cure durations and hardening rates based on shape profile dimensions.
Power reserve — mainspring tension ↔ hours of run time
Compute total mainspring operational run time based on turns of wind, barrel capacity, and balance wheel beat rate demands.
Coverage rate — chemical amount ↔ area treated
Determine total chemical volume or weight required based on the target area, sprayer output flow, and speed.