online electronic calculator - Ohm's law and much more

3 parallel resistors calculator

Online calculator for formulas used in electronic circuit design and electrical engineering.

Basic electric calculations:

Ohm's Law, Ohm's Law with power, DC power, AC real power, LC resonant frequency, Capacitor charging/discharging, Capacitive reactance, Capacitive current + reactive power, Capacitor energy, Capacitor Δ energy, RC discharging, Inductor square pulse, Inductive reactance, Inductive current + reactive power, Inductor energy, 2 parallel resistors, 3 parallel resistors, System bandwidth, Bandwidth ↔ rise time

Wire and winding calculations:

Diameter ↔ cross section ↔ AWG, Wire resistance, Wire weight, Current density, Wire R thermal drift

Calculate 3 parallel resistors: 15kΩ, 30kΩ, 10kΩ, kΩ


This calculates the total resistance of 3 parallel resistors. It can also calculate the resistance of the last individual resistor to reach a target total resistance.

Enter any 3 values, the 4th one will be calculated:

R1: -0.1 +0.1 -1 +1 -10 +10 -100 +100
R2: -0.1 +0.1 -1 +1 -10 +10 -100 +100
R3: -0.1 +0.1 -1 +1 -10 +10 -100 +100
Total R: -0.1 +0.1 -1 +1 -10 +10 -100 +100
Output metric prefix:   Automatic    User-selected
 

R1 - Standard EIA Decade Values of resistors - decade 10 to 100 kΩ

E6E12E24
10 kΩ
15 kΩ
22 kΩ
33 kΩ
47 kΩ
68 kΩ
10 kΩ, 12 kΩ
15 kΩ, 18 kΩ
22 kΩ, 27 kΩ
33 kΩ, 39 kΩ
47 kΩ, 56 kΩ
68 kΩ, 82 kΩ
10 kΩ, 11 kΩ, 12 kΩ, 13 kΩ
15 kΩ, 16 kΩ, 18 kΩ, 20 kΩ
22 kΩ, 24 kΩ, 27 kΩ, 30 kΩ
33 kΩ, 36 kΩ, 39 kΩ, 43 kΩ
47 kΩ, 51 kΩ, 56 kΩ, 62 kΩ
68 kΩ, 75 kΩ, 82 kΩ, 91 kΩ

R1 - Other resistance decades:

100 - 1000 mΩ, 1 - 10 Ω, 10 - 100 Ω, 100 - 1000 Ω, 1 - 10 kΩ, 10 - 100 kΩ, 100 - 1000 kΩ, 1 - 10 MΩ, 10 - 100 MΩ, 100 - 1000 MΩ,

R2 - Standard EIA Decade Values of resistors - decade 10 to 100 kΩ

E6E12E24
10 kΩ
15 kΩ
22 kΩ
33 kΩ
47 kΩ
68 kΩ
10 kΩ, 12 kΩ
15 kΩ, 18 kΩ
22 kΩ, 27 kΩ
33 kΩ, 39 kΩ
47 kΩ, 56 kΩ
68 kΩ, 82 kΩ
10 kΩ, 11 kΩ, 12 kΩ, 13 kΩ
15 kΩ, 16 kΩ, 18 kΩ, 20 kΩ
22 kΩ, 24 kΩ, 27 kΩ, 30 kΩ
33 kΩ, 36 kΩ, 39 kΩ, 43 kΩ
47 kΩ, 51 kΩ, 56 kΩ, 62 kΩ
68 kΩ, 75 kΩ, 82 kΩ, 91 kΩ

R2 - Other resistance decades:

100 - 1000 mΩ, 1 - 10 Ω, 10 - 100 Ω, 100 - 1000 Ω, 1 - 10 kΩ, 10 - 100 kΩ, 100 - 1000 kΩ, 1 - 10 MΩ, 10 - 100 MΩ, 100 - 1000 MΩ,

R3 - Standard EIA Decade Values of resistors - decade 10 to 100 kΩ

E6E12E24
10 kΩ
15 kΩ
22 kΩ
33 kΩ
47 kΩ
68 kΩ
10 kΩ, 12 kΩ
15 kΩ, 18 kΩ
22 kΩ, 27 kΩ
33 kΩ, 39 kΩ
47 kΩ, 56 kΩ
68 kΩ, 82 kΩ
10 kΩ, 11 kΩ, 12 kΩ, 13 kΩ
15 kΩ, 16 kΩ, 18 kΩ, 20 kΩ
22 kΩ, 24 kΩ, 27 kΩ, 30 kΩ
33 kΩ, 36 kΩ, 39 kΩ, 43 kΩ
47 kΩ, 51 kΩ, 56 kΩ, 62 kΩ
68 kΩ, 75 kΩ, 82 kΩ, 91 kΩ

R3 - Other resistance decades:

100 - 1000 mΩ, 1 - 10 Ω, 10 - 100 Ω, 100 - 1000 Ω, 1 - 10 kΩ, 10 - 100 kΩ, 100 - 1000 kΩ, 1 - 10 MΩ, 10 - 100 MΩ, 100 - 1000 MΩ,

Parallel resistors rule says:

• Connecting a 15kΩ (fifteen kiloohms), 30kΩ (thirty kiloohms) and a 10kΩ (ten kiloohms) resistors in parallel creates a 5kΩ (five kiloohms) resistance.
• To a parallel combination of a 15kΩ (fifteen kiloohms) and a 30kΩ (thirty kiloohms) resistor, you need to add a 10kΩ (ten kiloohms) resistor to bring the total resistance to 5kΩ (five kiloohms).



This is a simple online calculator for formulas used in electronic engineering and design.

This online calculator is for reference only. I do not guarantee it to work correctly. You use this at your own risk only.