To convert microns to rods, multiply by 1.988387815e-07. That factor is the whole relationship: both units measure length, so the conversion is a proportion with no offset and no substance-specific constant.
Sixteen and a half feet, or a quarter of a chain; it survives in old deeds and fence estimating. The older name for a micrometre, still standard in filtration, machining and paint-thickness specifications.
The mil and the millimetre are not the same thing and are out by a factor of about forty. A mil is one thousandth of an inch — 0.0254 mm — and a spec sheet that quotes film thickness in mils means the small unit. British drawings write the same size as "thou". Two tables follow: rounded steps for quick lookup, and a set of real reference quantities converted into rods, which is usually more useful than the bare number.
The formula
microns- The amount you are converting, in microns
1.98838781516e-07- The exact number of rods in one micron
rods- The converted result
How it works, step by step
- Enter the value in microns.
- It is multiplied by 1.98838781516e-07, the exact factor between the two units.
- The answer is shown in rods, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
A credit card’s long edge: 8.56e+04 micron in rods
At 8.56e+04 micron (a credit card’s long edge), the same quantity in rods is 8.56e+04 × 1.98839e-07 = 0.0170206 rd. One micron is 1.98839e-07 rods, so the numbers shrink as expected.
A door height: 2.03e+06 micron in rods
At 2.03e+06 micron (a door height), the same quantity in rods is 2.03e+06 × 1.98839e-07 = 0.403643 rd. One micron is 1.98839e-07 rods, so the numbers shrink as expected.
How to read your score
Frequently asked questions
How many rods are in one micron?
Exactly 1.98838781516e-07. Every figure on this page is that one number multiplied by your input, so the only rounding is at the display step.
What is the formula to convert microns to rods?
rods = microns × 1.98838781516e-07. Reversed, microns = rods ÷ 1.98838781516e-07, which is the same as multiplying by 5,029,200.
Which is the bigger unit, the micron or the rod?
The rod. One micron is only 1.98839e-07 of a rod, so it takes 5.0292e+06 microns to make one rod.
What does this quantity actually measure?
Both units measure length. That is why a single factor is enough: there is no temperature offset and no material property involved, unlike conversions that cross between different quantities.
What is a micron?
The older name for a micrometre, still standard in filtration, machining and paint-thickness specifications.
What is a rod?
Sixteen and a half feet, or a quarter of a chain; it survives in old deeds and fence estimating.
Why does my answer differ from another converter?
Almost always because the other tool rounded the factor before multiplying. This page keeps full double precision through the calculation and rounds only for display, and it prints the factor it used so you can see where any difference came from.
Is there a quick way to do micron to rd in my head?
Plenty of people do this in their head: divide by 5000000.000000 instead of using the exact factor 0.000000. At 100 that shortcut gives 0.000020 rods, off by 0.000000 rods or about 0.58%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Microns to rods reference tables
| Microns | Rods |
|---|---|
| 0.5 micron | 9.94194e-08 rd |
| 1 micron | 1.98839e-07 rd |
| 2 micron | 3.97678e-07 rd |
| 3 micron | 5.96516e-07 rd |
| 5 micron | 9.94194e-07 rd |
| 10 micron | 1.98839e-06 rd |
| 20 micron | 3.97678e-06 rd |
| 25 micron | 4.97097e-06 rd |
| 50 micron | 9.94194e-06 rd |
| 75 micron | 1.49129e-05 rd |
| 100 micron | 1.98839e-05 rd |
| 250 micron | 4.97097e-05 rd |
| 500 micron | 9.94194e-05 rd |
| 1000 micron | 0.000198839 rd |
| 5000 micron | 0.000994194 rd |
Exact factor: 1 micron = 1.98838781516e-07 rods.
| Quantity | micron | rd |
|---|---|---|
| A credit card’s long edge | 8.56e+04 micron | 0.01702 rd |
| A door height | 2.032e+06 micron | 0.404 rd |
| An Olympic pool | 5e+07 micron | 9.942 rd |
| The Eiffel Tower | 3.3e+08 micron | 65.62 rd |
| A marathon | 4.22e+10 micron | 8390 rd |
| Earth’s diameter | 1.274e+13 micron | 2.534e+06 rd |
Published reference values, converted with the same factor this page uses.