Red Light Dose Calculator

Short answer: Dose (J/cm²) = irradiance (mW/cm²) × time (seconds) ÷ 1,000. Enter a device's listed irradiance and a session time to see the arithmetic. This is a calculator, not a treatment recommendation. Follow your device's instructions. See irradiance and dose explained and our disclaimer.

Presets from product listings (arithmetic only):

Solbasium Bright: 100 mW/cm², 10 min Optix Knee: 20 mW/cm², 15 min LS Pro DSD120: 803 W/m², 10 min LS Pro MXP: 120 mW/cm², 10 min Body Balance Apollo: 150 mW/cm², 1 min

Or find the time for a target dose (J/cm²)

Irradiance depends on distance and design. Use the value the manufacturer states for your use. More time is not necessarily better.

See Every Red Light Therapy Device We Carry.