Candle Light Hours Calculator
Turn rooms, candles per room, and burn hours into candles and light hours.
What it does
Outage lighting plans fail on candle counts, not matches. Five rooms at 2 candles each need 10 candles, giving 80 light hours at 8 hours each, or 20 evenings at 4 hours a night.
The tool above takes rooms, candles per room, and burn hours each. It returns candle count, total light hours, and 4 hour evenings covered, so kits can be stocked before storms.
This math counts burn time only. It does not replace flashlights for stairs and tasks, nor does it make candles safe near curtains, kids, and pets.
Outage guidance frames the same kit: flashlights for every household member with batteries, plus fire safe candle practice, keeping flames 12 inches from anything flammable.
Prefer battery light for moving around. Reserve candles for one watched table spot per room.
How to use
- Count rooms needing light.
- Enter candles burning per room.
- Enter burn hours printed each candle.
- Read candles needed first for the kit list.
- Read light hours for the stock line.
- Read evenings to plan outage nights.
Formula
- rooms
- Rooms lit during outages.
- per room
- Candles burning in each room.
- hours
- Burn hours printed per candle.
Evenings use 4 hours of candle light each. Flashlights still cover stairs and tasks. Never leave burning candles unwatched.
Worked example
Example: 5 rooms, 2 candles each at 8 hours
Rooms 5, candles per room 2, hours each 8.
- Candles: 5 x 2 = 10 candles.
- Hours: 10 x 8 = 80 light hours.
- Evenings: 80 / 4 = 20 evenings.
- Tool shows 10 candles, 80 light hours, 20 evenings.
- Kit: 10 candles plus flashlights for stairs.
Reference table
| Hours each | Light hours | Evenings |
|---|---|---|
| 5 | 50 light hours | 12.5 evenings |
| 8 | 80 light hours | 20 evenings |
| 12 | 120 light hours | 30 evenings |
Limits
- Burn math only. Fire safety rules still govern use.
- Ignores drafts shortening real burn time.
- Flashlights still needed for stairs and tasks.
- Never substitute candles where flames are banned.
Common mistakes
- Counting candles without checking burn hours.
- Lighting every room instead of gathering in fewer.
- Leaving candles near curtains and kids.
- Using candles on stairs instead of flashlights.
- Storing all candles in one damp spot.
Try it yourself
Quick checks. Answers sit tucked under each question.
3 rooms, 4 candles each at 5 hours?
12 candles, 60 light hours, 15 evenings.
1 room, 1 candle at 10 hours?
1 candles, 10 light hours, 2.5 evenings.
6 rooms, 3 candles each at 6 hours?
18 candles, 108 light hours, 27 evenings.
Questions
How many candles for an outage?
Rooms times candles per room. 5 rooms at 2 need 10 candles.
How many light hours is that?
Candles times burn hours each. 10 at 8 hours give 80.
How many evenings will that cover?
Hours divided by 4. 80 hours cover 20 evenings.
Are candles safe for outages?
Only watched, 12 inches from flammables. Prefer flashlights for moving.
What belongs in an outage kit?
Flashlights for everyone, batteries, candles, matches, and water.
Where should candles burn?
One watched table spot per room, away from curtains, kids, and pets.