General Utilities x402 offerings

Paint quantity estimator from area, coverage, coats and waste - liters and gallons

Pallet count planner from unit count and units per pallet - pallets, unused capacity and utilization

Rule of 72 doubling-time calculator - approximate and exact years to double

Calculate running pace, mile-equivalent pace, and speed from distance and elapsed minutes, returning transparent arithmetic and a clear non-training or medical scope note.

Convert a race distance and total elapsed time into even-pace split estimates for any split distance, returning pace, split time, split count, formula, and training-scope limitations.

Convert annual salary to hourly, weekly and monthly gross equivalents

Seed count and cost estimator from planting area, seed density, waste and cost per 1000 seeds

Shipment ETA calculator from distance, average speed and handling hours

Tile quantity estimator from area, tile size and waste allowance

Unit conversion chart for length, weight, volume, area and data from one amount and unit

Vehicle trip fuel use and cost from distance, efficiency and fuel price

Average video bitrate calculator from duration and file size - Mbps and kbps

Calculate total frames and frame interval from constant frame rate and duration, returning transparent arithmetic and explicit timecode and variable-rate limitations.

Video pixel count calculator - total pixels, megapixels and aspect ratio

WCAG contrast ratio calculator for two sRGB colors - luminance, ratio and AA/AAA flags

Weighted grade calculator from score and weight arrays

Brazilian national holidays for a year - date, name and weekday

Chess position evaluation from Stockfish (Lichess cloud) - best lines, evaluation and mate-in-N

Color conversions for a hex color - RGB, HSL, CMYK, nearest CSS name, luminance and palette colors

VIN decoder - make, model, year, trim, body, engine, drivetrain, plant and safety equipment for any 17-character VIN, with check-digit validation (NHTSA vPIC)

Unix timestamp converter - unix seconds or milliseconds to ISO 8601 date, weekday and day of year, or a date to unix time

Temperature converter - convert between Celsius, Fahrenheit and Kelvin with all three equivalents

Area converter - convert between acres, hectares, square meters, square feet and square kilometers with all equivalents

Math expression evaluator - arithmetic, powers, percent, factorial and functions like sqrt, log and sin