light°: DLI & PPFD Calculator

Plan your plant lighting with light°. Enter the values you know and instantly calculate the one you need: • Daily Light Integral (DLI) from PPFD and lighting hours • Required PPFD from your target DLI and lighting hours • Required lighting hours from your target DLI and PPFD Use smooth sliders for quick adjustments or tap a value to enter an exact number. Your latest inputs and calculation mode are remembered on your device. Features: • Live calculations with clearly labeled units • Explanations for zero inputs and lighting schedules exceeding 24 hours • A built-in explanation of the calculation • Large text support and accessible controls • All calculations work offline • No account, ads, subscriptions, analytics, or tracking light° is a manual calculator. It does not measure light or use the camera. Enter PPFD from a suitable meter or another reliable source. Results assume a constant PPFD during the lighting period; choose target DLI for your own plants and growing conditions.