Render Time Calculator
How long a render will take on a given number of machines, with the total frames, the cost and the real speedup.
Results
Hours to render
15.0000
h
Frames in total
4320
The same in days
0.6250
d
Hours on one machine
54.000
h
Cost of the render
72.00
Frames an hour
288.00
Machine hours used
60.000
h
Seconds saved per frame
33.750
s
Real speedup
3.600
What this tool does
Frames multiply fast: three minutes at 24 frames a second is 4320 images, and at 45 seconds each that is fifty-four hours on one machine. Splitting the work across machines does not divide the time perfectly — there is always a scheduler, a file server and a slowest frame — so the efficiency is a field here rather than an assumption of a hundred per cent.
Formula
frames = duration × fps · time = frames × seconds per frame ÷ machines
Variables
| Symbol | Meaning | Unit |
|---|---|---|
mn | How long | min |
fps | Frames per second | — |
sf | Seconds to render one frame | s |
nd | How many machines | — |
ef | How well they share the work | % |
ph | Cost per machine hour | — |
HR | Hours to render | h |
NF | Frames in total | — |
DY | The same in days | d |
ON | Hours on one machine | h |
CO | Cost of the render | — |
FH | Frames an hour | — |
CM | Machine hours used | h |
SF | Seconds saved per frame | s |
SP | Real speedup | — |
Worked example
- How long3 min
- Frames per second24
- Seconds to render one frame45 s
- How many machines4
- How well they share the work90 %
- Cost per machine hour1.2
- Hours to render15.0000 h
- Frames in total4320
- The same in days0.6250 d
- Hours on one machine54.000 h
- Cost of the render72.00
- Frames an hour288.00
- Machine hours used60.000 h
- Seconds saved per frame33.750 s
- Real speedup3.600
Limitations
- The result is an estimate based only on the values you type. Real situations often include factors this calculator does not know about.
- The calculation runs at full precision and only the display is rounded. If you copy an intermediate value and retype it, small differences can appear.