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Add 40 light calculators

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2026-03-07 18:46:01 +00:00
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@@ -638,6 +638,46 @@ The registry currently contains 416 unique calculator slugs.
| Long Tons to Pounds – Convert long tons to pounds. | long-tons-to-pounds | 2240 |
| Long Tons to Short Tons – Convert long tons to short tons. | long-tons-to-short-tons | 1.12 |
| Lux to Foot-candles – Convert illuminance from lux to foot-candles. | lux-to-foot-candles | 0.09290304 |
| Candela to Foot-candles – At 1 foot away, one candela yields one foot-candle of illuminance. | candela-to-foot-candles | 1 |
| Foot-candles to Candela – Convert illuminance in foot-candles into a luminous intensity at 1 foot. | foot-candles-to-candela | 1 |
| Candela to Lux (1 ft) – One candela at a 1-foot distance produces about 10.7639 lux on the target plane. | candela-to-lux-at-foot | 10.7639 |
| Lux to Candela (1 ft) – Turn lux measured 1 foot away into the equivalent candela luminous intensity. | lux-to-candela-at-foot | 0.09290304 |
| Candela to Nits – Treat 1 candela distributed over 1 square meter as 1 nit for comparing luminance. | candela-to-nits | 1 |
| Nits to Candela – Assume a 1-square-meter patch to convert nits into candela. | nits-to-candela | 1 |
| Candela to Candlepower – Translate candela intensity into the legacy candlepower scale (1 cd ≈ 1.01937 cp). | candela-to-candlepower | 1.019367 |
| Candlepower to Candela – Flip historical candlepower values back into modern candelas (1 cp ≈ 0.981 cd). | candlepower-to-candela | 0.981 |
| Candlepower to Lumens – Treat candlepower as a luminous intensity, then multiply by 4π to get flux. | candlepower-to-lumens | 12.3269 |
| Lumens to Candlepower – Convert luminous flux back into candlepower by reversing the 4π factor. | lumens-to-candlepower | 0.081118 |
| Candlepower to Foot-candles – At 1 foot, candlepower produces 0.981 foot-candles via its candela equivalent. | candlepower-to-foot-candles | 0.981 |
| Foot-candles to Candlepower – Convert illuminance into candlepower using the 1-foot reference. | foot-candles-to-candlepower | 1.019367 |
| Foot-candles to Lamberts – Convert illuminance into lamberts for diffuse-surface brightness (1 fc ≈ 0.0010764 L). | foot-candles-to-lamberts | 0.00107639 |
| Lamberts to Foot-candles – One lambert gives about 929 foot-candles on a Lambertian surface. | lamberts-to-foot-candles | 929.03 |
| Lamberts to Lux – A lambert equals 10,000 lux on a perfectly diffusing target. | lamberts-to-lux | 10000 |
| Lux to Lamberts – Translate lux into lamberts by dividing by 10,000 for diffuse luminance. | lux-to-lamberts | 0.0001 |
| Lamberts to Nits – One lambert is about 3,183 cd/m² (nits). | lamberts-to-nits | 3183.09886184 |
| Nits to Lamberts – Convert surface brightness back into lamberts using the 1/π² scaling. | nits-to-lamberts | 0.0003141593 |
| Foot-lamberts to Lux – A foot-lambert is about 10.764 lux on a Lambertian patch. | foot-lamberts-to-lux | 10.764 |
| Lux to Foot-lamberts – Convert lux into foot-lamberts (1 lux ≈ 0.092903 ft-L). | lux-to-foot-lamberts | 0.09290304 |
| Foot-lamberts to Nits – Express foot-lamberts as nits (1 ft-L ≈ 3.426259 cd/m²). | foot-lamberts-to-nits | 3.426259108 |
| Nits to Foot-lamberts – Translate luminance measured in nits into foot-lamberts. | nits-to-foot-lamberts | 0.292 |
| Phot to Lux – One phot equals 10,000 lux for film-lighting references. | phot-to-lux | 10000 |
| Lux to Phot – Convert lux into phots to match old photographic light charts. | lux-to-phot | 0.0001 |
| Phot to Lamberts – Phot and lambert coincide (1 phot = 1 lambert). | phot-to-lamberts | 1 |
| Lamberts to Phot – Flip lamberts back into phots. | lamberts-to-phot | 1 |
| Phot to Foot-lamberts – One phot (10,000 lux) equals about 929 foot-lamberts. | phot-to-foot-lamberts | 929.03 |
| Foot-lamberts to Phot – Express foot-lamberts as phots (1 ft-L ≈ 0.0010764 phot). | foot-lamberts-to-phot | 0.00107639 |
| Lumens to Lux per square meter – Spread lumens over 1 m² to get lux. | lumens-to-lux-per-square-meter | 1 |
| Lux to Lumens per square meter – Treat lux as lumens on each square meter. | lux-to-lumens-per-square-meter | 1 |
| Foot-candles to Phot – Convert foot-candles into phots via the 10,000 lux anchor. | foot-candles-to-phot | 0.00107639 |
| Phot to Foot-candles – Express phots as foot-candles for practical light meter use. | phot-to-foot-candles | 929.03 |
| Lumens to Nits per square meter – A lumen/m² (lux) equals about 0.31831 nits under Lambertian lighting. | lumens-to-nits-per-square-meter | 0.318309886 |
| Nits to Lumens per square meter – Back-convert nits into lumens/m² using π. | nits-to-lumens-per-square-meter | 3.141592654 |
| Lumens to Foot-lamberts per square meter – One lux equals 0.092903 foot-lamberts. | lumens-to-foot-lamberts-per-square-meter | 0.09290304 |
| Foot-lamberts to Lumens per square meter – Translate foot-lamberts into lux for metric flux (multiply by 10.7639). | foot-lamberts-to-lumens-per-square-meter | 10.7639 |
| Stilbs to Nits – A stilb equals 10,000 nits for high-luminance scopes. | stilbs-to-nits | 10000 |
| Nits to Stilbs – Convert nits into the CGS stilb scale (1 nit = 0.0001 stilb). | nits-to-stilbs | 0.0001 |
| Stilbs to Lux – Multiply stilbs by π to get the matching lux value (≈ 31,415.93 lux). | stilbs-to-lux | 31415.92654 |
| Lux to Stilbs – Express lux as stilbs by dividing by π × 10,000. | lux-to-stilbs | 0.00003183 |
| Mach to Feet per Second – Convert Mach number to feet per second (approximate sea-level speed of sound). | mach-to-feet-per-second | 1116.447 |
| Mach to Kilometers per Hour – Convert Mach number to km/h. | mach-to-kilometers-per-hour | 1225.044 |
| Mach to Knots – Convert Mach number to knots. | mach-to-knots | 661.47 |