All Tools (175)

Convert Unix file permissions between octal and rwx notation.

Solve radius, diameter, circumference, and area from one measurement, with common length units.

Check WCAG text contrast ratios for two web colors.

Convert and preview HEX, RGB, and HSL colors.

Calculate sales commission, total earnings, and target sales.

Estimate final balance, contributions, and interest earned with compounding.

Find distance, midpoint, slope, and line equation from two points.

Calculate electrostatic force between two point charges.

Start, pause, reset, and use quick countdown presets in your browser.

Understand each field in a five-field cron schedule.

Build layered CSS box shadows with a live preview.

Build fluid CSS clamp() values from size and viewport endpoints.

Create copyable linear and radial CSS gradients with a live preview.

Compare CSS selector specificity scores.

Build layered CSS text shadows with a live preview.

Convert relative CSS units with the context that determines their real size.

Convert structured CSV and JSON data in either direction.

Split total current across parallel resistors and calculate branch currents, voltage, resistance, and power.

Convert bits, bytes, kB, MB, GB, KiB, MiB, GiB, and more.

Find exact years, months, elapsed days, inclusive days, weeks, weekdays, and weekends between two dates.

Convert relative power and amplitude ratios to and from decibels.

Solve density, mass, or volume with unit conversion.

Solve C₁V₁ = C₂V₂ with compatible concentration and volume units.

Find final price and savings after a percentage discount.