Linear Dimensions
Length and distance conversions across imperial, U.S. customary, and metric units used in engineering, construction, layout, and travel.
Examples: inches to mm, feet to meters, miles to km
Open Linear DimensionsConverter hub
Choose the converter family first, then pick your exact units
Start with the family that matches your problem. Once you open a converter, use the input picker, result picker, and flip button to jump straight to the exact unit pair you need.
How it works now
- Choose one family here
- Open a live converter page
- Switch input and result units inside that page
- Use individual converter pages for search and SEO
Live families
Open the family you need
Area
Surface and footprint conversions for sheet stock, floor space, land measurement, coatings, and plan-view calculations.
Examples: square inches to square mm, square feet to square meters, acres to hectares
Open AreaVolume
Container, displacement, and capacity conversions for liquids, storage, packaging, and geometry-based quantity checks.
Examples: liters to gallons, cubic inches to cubic cm, cubic feet to cubic meters
Open VolumeVolume Flow
Flow-rate conversions for pumps, piping, compressed air, coolant systems, and process engineering.
Examples: gpm to liters per minute, cfm to cubic meters per hour, liters per second to gpm
Open Volume FlowSpeed
Travel and motion-rate conversions for transport, rotating systems, test rigs, and machine movement.
Examples: mph to km/h, m/s to ft/s, knots to mph
Open SpeedTime
Time and duration conversions for scheduling, cycle times, process timing, and rate calculations.
Examples: seconds to minutes, minutes to hours, hours to days
Open TimeTemperature
Thermal scale conversions for environmental conditions, ovens, refrigeration, process windows, and materials work.
Examples: Fahrenheit to Celsius, Celsius to Fahrenheit, Celsius to Kelvin
Open TemperatureMass
Mass and weight-adjacent conversions for parts, raw material, shipping, lab work, and specification sheets.
Examples: pounds to kilograms, ounces to grams, tons to metric tons
Open MassForce
Force conversions for mechanics, fastener loading, structural checks, and machine design.
Examples: newtons to lbf, kN to lbf, kgf to newtons
Open ForcePressure
Pressure conversions for pneumatics, hydraulics, gas systems, pumps, vacuum work, and process instrumentation.
Examples: psi to bar, psi to MPa, kPa to psi
Open PressureEnergy
Energy conversions for thermal calculations, storage, utilities, and cross-discipline technical references.
Examples: joules to BTU, kWh to joules, calories to joules
Open EnergyPower
Power conversions for motors, electrical systems, engines, heating equipment, and machine capability comparisons.
Examples: watts to horsepower, kW to hp, BTU/hr to watts
Open PowerTorque
Torque conversions for bolting, shafts, drivetrain components, and machine setup work.
Examples: Nm to ft-lb, ft-lb to Nm, in-lb to Nm
Open TorqueAngle
Angular conversions for geometry, machining, CAD, surveying, and instrument setup.
Examples: degrees to radians, radians to degrees, degrees to arcminutes
Open AngleFrequency
Frequency conversions for vibration, electrical systems, controls, acoustics, and rotating equipment.
Examples: Hz to rpm, rpm to Hz, kHz to Hz
Open FrequencyDensity
Density conversions for material lookup, fluid properties, and weight-per-volume checks.
Examples: g/cm^3 to lb/in^3, kg/m^3 to lb/ft^3, lb/gal to kg/m^3
Open DensityData Size
Digital storage and transfer-size conversions for files, memory, throughput context, and technical documentation.
Examples: bytes to KB, MB to GB, GiB to MiB
Open Data SizeLater backlog
Planned converter families and future expansion
The main hub is intentionally simple now. Family selection happens here, and detailed unit selection happens inside each live converter. Future categories can plug into the same structure without turning this page into a giant directory again.