Youlumi logo
English
GET A QUOTE

Red Light Therapy Dosage Calculator (CW & Pulsed 10Hz/40Hz)

Enter irradiance (mW/cm²), time, and duty cycle. Instantly calculate dose (J/cm²) and total energy (J). Supports CW and pulsed modes (10Hz/40Hz). Useful for clinics, rehab, and aesthetic training.

Frequency is informational only; duty cycle defines average irradiance.
CW = 100%; pulsed at 50% → 50.
Manufacturer spec or light meter reading.
min sec
For total energy. For J/cm² only, any value works.
Formula: Average = CW×Duty%; Dose = Average×Time(s)/1000.
Formula: Time(s)=Dose×1000/Average.

How to Use

Example: CW 80 mW/cm², 10 min, 10Hz at 50% duty → avg 40 mW/cm² → dose = 40×600/1000 = 24 J/cm².

Safety & Notes

  • High irradiance for long times may cause heat sensation. Adjust distance/time.
  • Pulsed mode: caution in epilepsy/photosensitivity. Always use eye protection.
  • Device irradiance varies. Confirm with manufacturer spec or light meter.

Note: Educational use only. Not medical advice.

FAQ

How to convert mW/cm² to J/cm²?
Dose = Average×Time(s)/1000. In pulsed mode, Average = CW×Duty.
Does duty cycle change dose?
Yes. 100 mW/cm² at 50% duty → 50 mW/cm²; dose halves for same time.
What are typical ranges?
Skin 4–10 J/cm² (CW), pain 10–30 (10Hz), muscle 30–60 (10Hz), focus 5–15 (40Hz).
Only wattage given — can I calculate dose?
No. Need irradiance (mW/cm²) at distance. Check spec or measure.
How to back-calculate time?
Time(s)=Dose×1000/Average. Ex: 12 J/cm² @40 → 300s (5 min).
Contact
Have questions or need a custom dosing plan?
Talk to our team — we’ll reply within 1 business day.
Contact Sales
leave your email and our latest catalogue will be sent to you!
YouLumi logo
Youlumi research, designs, develops & manufactures LED Lighting Products.

Products

Company

Contact

Floor 4, A Building No. 37 Kengwei Road Shiyan Town, Bao’an, Shenzhen, China. 518000
©2025 Shenzhen Youlumi Co, Ltd. All Rights Reserved.

REQUEST A QUOTE

Have a question or want to learn more about what we do? We're here to help you.