How do I calculate Encoder Resolution & Positioning Accuracy?

To calculate Encoder Resolution & Positioning Accuracy: Enter Encoder resolution, Quadrature counting (A/B), Gearbox ratio (motor to encoder) and other values. Click Calculate. INDUGRID computes the result instantly using the formula: Resolution = (360° / PPR × gear_ratio) | Linear: distance_per_pulse = pitch / (PPR × 4). No registration required.

What units does the Encoder Resolution & Positioning Accuracy calculator use?

The Encoder Resolution & Positioning Accuracy calculator uses the following units: PPR, mm/rev. SI units are used by default.

Automation & Control

Encoder Resolution & Positioning Accuracy

Calculate positioning accuracy, speed measurement resolution and distance per pulse for rotary and linear encoders.

Units:

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💡Quadrature (A/B) encoders give 4× the base resolution by counting all edges. A 1000 PPR encoder with quadrature counting gives 4000 counts/revolution. Interpolation electronics can further multiply resolution by 5–1000×.

Resolution = (360° / PPR × gear_ratio) | Linear: distance_per_pulse = pitch / (PPR × 4)

Input

Encoder resolution iEncoder resolution in Pulses Per Revolution (PPR) or lines. Standard: 100, 256, 500, 1000, 1024, 2048, 4096, 8192.

PPR

Quadrature counting (A/B) iQuadrature encoders count rising and falling edges of both A and B channels = 4× resolution.

Gearbox ratio (motor to encoder) iGear ratio between the measured axis and the encoder. 1 = encoder directly on axis.

Lead screw / belt pitch iLinear travel per encoder revolution (lead screw pitch, belt pitch, or wheel circumference) in mm/rev.

mm/rev

Result

Counts per revolution [counts/rev] —

Angular resolution [°/count] —

Linear resolution [µm/count] —

Max. input frequency note —