Engineering reference / SI-aware

Convert engineering units with context

Convert length, pressure, temperature, and flow values in seconds with transparent formulas, assumptions, and bilingual English–Spanish explanations.

Open the unit converter

Start with a quick 1 bar → 100 kPa example or enter your own value.

02 / Live unit converter

Live unit converter

Choose a category, enter a value, and inspect the result alongside the formula and assumptions used.

Loading converter…

03 / Supported engineering units

Supported engineering units

Four practical categories cover the unit families used across early engineering checks and field calculations.

Length
length

Dimensions, clearances, and geometry checks.

  • mm
  • cm
  • m
  • km
  • in
  • ft
Pressure
pressure

Process, hydraulic, and pneumatic readings.

  • Pa
  • kPa
  • bar
  • psi
Temperature
temperature

Equipment, material, and environmental scales.

  • °C
  • °F
  • K
Volumetric flow
flow

Pumps, pipes, ventilation, and process equipment.

  • L/s
  • m³/s
  • m³/h
  • gpm
  • cfm

04 / A practical conversion reference

A practical conversion reference

Kernspan keeps common engineering conversions close at hand for early design checks, field notes, and specification reviews. The calculator covers the unit families people reach for most often: length, pressure, temperature, and flow.

Every result includes the source and destination units, a readable formula note, and assumptions in plain language. That context makes it easier to sanity-check a number before it moves into a drawing, schedule, or equipment decision.

Use it in three quick steps

Make the conversion, then keep the context with the number as you review your work.

  1. 01Select the engineering quantity you want to convert.
  2. 02Enter a finite value and choose the source and destination units.
  3. 03Review the result, formula, and assumptions before applying it to your work.

05 / Formulas you can audit

Formulas you can audit

The converter keeps the math visible so you can check how a value moves through its reference unit.

Base-factor conversions

Base value = input × source factor; result = base value ÷ destination factor. Length, pressure, and flow use a reference unit: m, Pa, and m³/s.

Temperature scales

C = (F − 32) × 5/9; K = C + 273.15. Reverse equations are applied when converting back to Fahrenheit or Celsius.

06 / Preliminary-use note

Preliminary-use note

This is a preliminary conversion aid, not a final design or safety authority. Verify inputs, standards, material data, and project-specific conditions with the responsible engineer before issuing work or making a safety decision.

07 / Unit conversion questions

Unit conversion questions

08 / Continue with a focused calculator

Continue with a focused calculator

When a conversion is part of a larger check, use one of Kernspan’s focused engineering calculators.

Duct sizing

Estimate airflow, velocity, and pressure gradient for a round or rectangular duct.

Duct sizing
Pipe pressure drop

Review Darcy–Weisbach pressure loss with fluid, pipe, and flow assumptions visible.

Pipe pressure drop
Lighting level

Estimate preliminary fixture quantity and achieved illuminance for a room.

Lighting level