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
Water resistance — ATM ↔ bar ↔ meters depth rating
Convert water pressure tolerances across ATM, Bar, and depth meters. Understand safe real-world water sport activities.
Warp and weft density — ends per cm ↔ picks per cm
Convert thread density between ends/picks per centimeter and ends/picks per inch (EPI/PPI).
Brick Count Estimator
Calculate bricks, mortar volume, sand, and cement needed for masonry walls.
Pallet Configuration (Boxes/Pallet)
Optimize pallet loading layouts by calculating maximum box stacking of specified dimensions onto standard pallet sizes.
Brace height ↔ bow limb angle — performance tuning
Calculate bow limb angle and string tension variations based on brace height adjustments for optimal bow tuning.
Annealing temperature — glass type ↔ strain point ↔ anneal point
Calculate strain point, anneal point, and custom cooling schedules based on glass type and thickness to prevent stress fractures.
Coordinate converter — WGS84 ↔ local datum
Convert geographic coordinates between global WGS84 (GPS) and local datums, including UTM zone coordinate conversions.
Batch recipe ↔ percentage recipe — glaze chemistry
Normalize raw ingredient batch weights to percentage formulations or scale a recipe to any total batch weight.
Steel bar weight — cross section ↔ length ↔ kg
Calculate steel bar weights for square, round, or flat profiles based on thickness and length.
Ore Grade & Concentration Converter
Convert mineral grade concentrations between grams per ton (g/t), weight percentage (%), troy ounces per ton (oz/st), and ppm.
Muzzle velocity — fps ↔ m/s ↔ km/h
Convert velocities between fps, m/s, and km/h. Calculate muzzle kinetic energy in Joules and Foot-Pounds.
Cosmic Distance Converter
Convert huge distances across Light Years, Parsecs, Astronomical Units, and Kilometers.
Flesch-Kincaid Reading Level
Calculate readability scores and Flesch-Kincaid school grade levels for any input text in real-time.
Sidereal Time Converter
Convert between standard Solar Time and Sidereal Time based on your longitude.
Carton CBM ↔ Container Capacity
Convert carton dimensions to Cubic Meters (CBM) and calculate carton capacity for 20ft and 40ft shipping containers.
Yarn Weight Converter
Convert yarn sizes across WPI (Wraps Per Inch), ply, and standard weight categories.
Bread Dough Hydration Calculator
Convert between flour weight, water weight, and hydration percentages for perfect baking doughs.
Net metering — units exported ↔ bill credit estimate
Estimate utility bill credits, net energy offsets, and financial yields under 1:1 net metering or dual-rate net billing programs.
Rivet size — leather thickness ↔ post length needed
Calculate the correct rivet post length based on your total leather material stack thickness and hardware style.
Drawing out ratio — starting thickness ↔ final length
Estimate expanded length when forging down the cross-section thickness of hot steel bars under conservation of volume.