Nearest E24 Resistor Value
Round to nearest standard E24 value
Quick answer
This calculator solves nearest = round_to_E24(R) for Round to nearest standard E24 value. With Target Resistance 0.47 kΩ, the result is 470.
Calculator
Formula
Description
The E24 series defines 24 standard resistor values per decade, corresponding to 5% tolerance resistors. Values are geometrically spaced so that each value is approximately 10^(1/24) ≈ 1.101 times the previous one. When designing circuits, you must select from available standard values rather than arbitrary computed values. This formula finds the nearest E24 value to any target resistance. Other standard series include E12 (10%), E48 (2%), E96 (1%), and E192 (0.5%).
Variables
- R — Target resistance value (Ω)
Practical Notes
The E24 series values per decade are: 1.0, 1.1, 1.2, 1.3, 1.5, 1.6, 1.8, 2.0, 2.2, 2.4, 2.7, 3.0, 3.3, 3.6, 3.9, 4.3, 4.7, 5.1, 5.6, 6.2, 6.8, 7.5, 8.2, 9.1. For tighter tolerance designs, use E96 or E192 series which provide finer granularity. The output is the nearest standard value in the same decade as the input.
Symbols and units
| Symbol | Meaning | Default unit | Accepted units |
|---|---|---|---|
| R | Target Resistance | Ω | mΩ, Ω, kΩ, MΩ |
Step by step
- 1. What you know: Target Resistance 0.47 kΩ
- 2. The relation: nearest = round_to_E24(R)
- 3. Substitute: R = 0.47 kΩ
- 4. Result: Round to nearest standard E24 value = 470
Worked examples
Minimum range
Given: Target Resistance 1 Ω
Result: Round to nearest standard E24 value = 1
Low range
Given: Target Resistance 10 Ω
Result: Round to nearest standard E24 value = 10
Typical
Given: Target Resistance 0.47 kΩ
Result: Round to nearest standard E24 value = 470
High range
Given: Target Resistance 4.7 kΩ
Result: Round to nearest standard E24 value = 4700
Maximum range
Given: Target Resistance 47 kΩ
Result: Round to nearest standard E24 value = 47000
How Round to nearest standard E24 value changes with Target Resistance
| Target Resistance (input) | Round to nearest standard E24 value (result) |
|---|---|
| 47 Ω | 47 |
| 117.5 Ω | 120 |
| 0.235 kΩ | 240 |
| 0.3525 kΩ | 360 |
| 0.47 kΩ | 470 |
| 0.705 kΩ | 680 |
| 0.94 kΩ | 910 |
| 1.88 kΩ | 1800 |
| 3.29 kΩ | 3300 |
| 4.7 kΩ | 4700 |
Embed this calculator
Paste this into any page. It keeps working when this page updates, and credits the source.
<iframe src="https://vbatpower.com/embed/e-series-nearest/" width="100%" height="460" style="border:1px solid #1f2a37;border-radius:12px" loading="lazy" title="Nearest E24 Resistor Value"></iframe>
<p><a href="https://vbatpower.com/formulas/e-series-nearest/">Nearest E24 Resistor Value</a> Calculator by vbatpower.com</p>Frequently asked questions
How do you calculate Nearest E24 Resistor Value?
Use nearest = round_to_E24(R). With Target Resistance 0.47 kΩ, Round to nearest standard E24 value works out to 470.
What is the formula for Nearest E24 Resistor Value?
The formula is nearest = round_to_E24(R). The E24 series defines 24 standard resistor values per decade, corresponding to 5% tolerance resistors.
Related Concepts
All Resistors formulas →Need more features?
Save calculations, import telemetry data, simulate battery discharge, and collaborate with your team.
Try the App