Solve Q = mcΔT for heat, mass, specific heat, or temperature change.

Convert km/h, mph, m/s, ft/s, and knots instantly.

Build an SPF TXT record for domain email senders.

Mean, median, mode, variance, standard deviation, and more.

Convert Celsius, Fahrenheit, and Kelvin temperatures.

Compare two texts and find line-by-line changes.

Solve linear thermal expansion with ΔL = αL₀ΔT.

Find hours, minutes, total minutes, and decimal hours between times.

Convert times between searchable IANA time zones.

Find tip, total, and per-person split for a bill.

Solve torque, force, or lever arm with τ = rF sin(θ).

Calculate transformer turns ratio, secondary turns, current, and reflected impedance.

Solve triangle sides, angles, area, and perimeter.

Find the price per unit for packages and multipacks.

Convert Unix seconds, milliseconds, ISO dates, UTC, and local time.

Convert URL text to and from percent encoding.

Inspect URL components and query parameters.

Convert UTC into local time with offsets and ISO output.

Count UTF-8 bytes, Unicode code points, and UTF-16 code units.

Create tagged campaign links with standard UTM parameters.

Create secure random UUID v4 values.

Calculate voltage-divider output or solve R2 for a target voltage.

Convert liters, gallons, cups, fluid ounces, and cubic units.

Solve wavelength, frequency, or wave speed with v = fλ.