Rendering turns a 3D scene into finished images, and for animation every single frame has to be rendered. A one-minute shot at 24 frames per second is 1,440 frames, so even a modest 5 minutes per frame adds up to 120 hours on one computer. Studios split the work across a render farm; because frames are independent, doubling the number of machines roughly halves the wall-clock time.
The same relationship answers the planning questions artists actually face. With a fixed deadline, how long can each frame take? How many frames can be finished? How many machines (or cloud nodes) are needed? This calculator handles all four cases, and lets you enter the deadline either as a duration or as start and finish dates and times.
It also reports the running time of the resulting animation and estimates the electricity used and its cost, which is useful when comparing a home workstation with a cloud render service. The model assumes equally fast machines running around the clock and ignores overheads such as scene loading, so add a safety margin of 10–20% for real projects.
How to use the 3D Render Time Calculator
- Calculate
- Render time per frame (on one machine)
- Number of frames
- Number of machines (render nodes)
- Deadline given as
- Available render time
- Start date
- Start time
- Finish date
- Finish time
- Frame rate of the animation (fps)
- Power draw per machine
- Electricity price per kWh
Results update as you type, every field has its own unit menu, and everything is calculated in your browser.
How it works
Choose what to solve for. The available time comes from the duration or from the difference between the start and finish moments. The remaining values follow from total time = time per frame × frames ÷ machines.
Worked example
A 60-second shot at 24 fps has 1,440 frames. At 6 minutes per frame on 4 machines the total is 1,440 × 6 ÷ 4 = 2,160 minutes = 36 hours. Four 350 W machines for 36 hours use 4 × 0.35 × 36 = 50.4 kWh, or 7.56 at 0.15 per kWh.
If the deadline is instead 57 hours away (9:00 today to 18:00 the day after tomorrow), each frame may take at most 57 × 60 × 4 ÷ 1,440 = 9.5 minutes.
Frames per length of animation
| Length | 24 fps | 30 fps | 60 fps |
|---|---|---|---|
| 10 s | 240 | 300 | 600 |
| 1 min | 1,440 | 1,800 | 3,600 |
| 5 min | 7,200 | 9,000 | 18,000 |
| 90 min | 129,600 | 162,000 | 324,000 |
Inputs explained
| Field | What to enter |
|---|---|
| Calculate | Choose one: Total render time, Maximum time per frame for a deadline, How many frames fit before a deadline, Machines needed for a deadline |
| Render time per frame (on one machine) | Units: min, s, h |
| Number of frames | A number |
| Number of machines (render nodes) | A number |
| Deadline given as | Choose one: Available time, Start and finish date and time |
| Available render time | Units: h, min, days, s |
| Start date | A date |
| Start time | A clock time (hours and minutes) |
| Finish date | A date |
| Finish time | A clock time (hours and minutes) |
| Frame rate of the animation (fps) | A number |
| Power draw per machine | Units: W, kW |
| Electricity price per kWh | Amount in your currency |
What each result means
- Total render time = [Total (s)]
- Maximum render time per frame = [Time per frame (s)]
- Frames you can render = [Frames]
- Machines needed = [Machines]
- Total render time with these numbers = [Total (s)]
- Render time as h:mm:ss = [Total (s)]
- Available time = [Available time (s)]
- Length of the finished animation = [Frames]÷[Frame rate of the animation (fps)]
- Frames finished per hour (whole farm) = [Frames]÷[Total (s)]×3600
- Machine-hours = [Total (s)]×[Machines]÷3600
- Electricity used = [Machines]×[Power draw per machine]×[Total (s)]÷3.6e6
- Electricity cost = [Electricity used]×[Electricity price per kWh]
Formula
Total render time = time per frame × frames ÷ machines · Max time per frame = available time × machines ÷ frames · Machines needed = ⌈time per frame × frames ÷ available time⌉ · Energy = machines × power × time
Worked example
Inputs — Calculate: Total render time; Render time per frame (on one machine): 6 min; Number of frames: 1,440; Number of machines (render nodes): 4; Frame rate of the animation (fps): 24; Power draw per machine: 350 W; Electricity price per kWh: $0.15.
Results — Total render time = 36 h; Render time as h:mm:ss = 36:00:00; Length of the finished animation = 1:00; Frames finished per hour (whole farm) = 40; Machine-hours = 144 h; Electricity used = 50.4 kWh; Electricity cost = $7.56.
Key terms
- Render farm
- A group of computers that render frames in parallel.
- Render node
- One machine in a render farm.
- Machine-hours
- Number of machines multiplied by the hours they run.
- Frame rate
- Frames per second of the finished animation, usually 24, 25 or 30.
Frequently asked questions
How long does it take to render one minute of animation?
At 24 fps that is 1,440 frames. At 5 minutes per frame on one machine it takes 120 hours (5 days); on 10 machines, 12 hours.
How long did Pixar films take to render?
Feature films need tens of millions of CPU-hours. Reported averages range from several hours to more than a day per frame, spread over render farms with thousands of cores.
Does doubling the machines halve the time?
Nearly, because frames are independent. In practice, file transfer and scene loading add a few per cent of overhead.
How do I measure time per frame?
Render a few representative frames (including the heaviest shots) at final quality and average them.
How much electricity does rendering use?
A 350 W workstation running for 36 hours uses 12.6 kWh – about 1.89 at 0.15 per kWh.
Should I add a safety margin?
Yes. Plan for 10–20% extra time for re-renders, crashes and heavier frames than your test.