# Understand Accuracy

Learn how Moasure measures, what affects accuracy, and how to achieve the best possible results.

### **How Moasure Works**

Moasure measures **continuously while you move** (device is in flight), capturing position data hundreds of times per second using advanced motion sensors.

A measurement point is only confirmed when the device is **placed completely still**.

***

### **How Accuracy Works**

With motion-based measuring:

**Error increases with time, not distance.**

This means:

* The longer you move without pausing, the more error can build
* Regular pauses help maintain accuracy
* Smooth, controlled movement improves results

***

### **What Affects Accuracy**

Accuracy is influenced by how the device is used:

* Movement speed and consistency
* How well the device is placed and held still
* Frequency of pause points
* Surface stability (e.g. soft or uneven ground)

***

### **Moasure Accuracy Details**

| Measurement Type  | Moasure ONE   | Moasure 2     | Moasure 2 PRO |
| ----------------- | ------------- | ------------- | ------------- |
| Linear Distance   | ±0.5% error   | ±0.5% error   | ±0.3% error   |
| Perimeter         | ±1% error     | ±1% error     | ±0.5% error   |
| Elevation         | ±0.5% error   | ±0.5% error   | ±0.3% error   |
| Area              | ±2% error     | ±2% error     | ±1% error     |
| Volume            | ±3% error     | ±3% error     | ±1.5% error   |
| Layout (PRO only) | Not available | Not available | ±1% error     |

*Accuracy will vary depending on device handling, environment, and user technique.*

*Layout measurements are available on Moasure 2 PRO only.*

***

### **What This Means in Practice**

#### **Imperial Examples (Moasure 2 PRO)**

* If your **linear distance** measurement totals **300ft**, accuracy is within **±0.3%**, resulting in a potential error of up to **0.9ft**.
* If your **perimeter** measurement totals **300ft**, accuracy is within **±0.5%**, resulting in a potential error of up to **1.5ft**.
* If your **elevation** measurement totals **300ft**, accuracy is within **±0.3%**, resulting in a potential error of up to **0.9ft**.
* If your **area** measurement totals **300ft²**, accuracy is within **±1%**, resulting in a potential error of up to **3ft²**.
* If your **volume** measurement totals **300ft³**, accuracy is within **±1.5%**, resulting in a potential error of up to **4.5ft³**.
* If your **layout** measurement totals **300ft**, accuracy is within **±1%**, resulting in a potential error of up to **3.0ft**.

***

#### **Metric Examples (Moasure 2 PRO)**

* If your **linear distance** measurement totals **100m**, accuracy is within **±0.3%**, resulting in a potential error of up to **0.3m**.
* If your **perimeter** measurement totals **100m**, accuracy is within **±0.5%**, resulting in a potential error of up to **0.5m**.
* If your **elevation** measurement totals **100m**, accuracy is within **±0.3%**, resulting in a potential error of up to **0.3m**.
* If your **area** measurement totals **100m²**, accuracy is within **±1%**, resulting in a potential error of up to **1m²**.
* If your **volume** measurement totals **100m³**, accuracy is within **±1.5%**, resulting in a potential error of up to **1.5m³**.
* If your **layout** measurement totals **100m**, accuracy is within **±1%**, resulting in a potential error of up to **1m**.

***

### **How to Improve Accuracy**

To achieve the best results, focus on these three key [Measuring Techniques](/en/moasure/measuring-technique.md):

[**Pace**](/en/moasure/measuring-technique/master-pace.md)\
Move at a steady, controlled speed between pause points.

[**Placement**](/en/moasure/measuring-technique/master-placement.md)\
Place the device down flat and completely still.

[**Rotation**](/en/moasure/measuring-technique/master-rotation.md)\
Rotate smoothly and avoid sudden movements.

***

### **Check Your Accuracy**

After completing a measurement, review your **Start/Finish error**:

* Lower percentage = higher accuracy
* Aim for **under 1%** where possible

If the error is higher than expected, use [**Moasure Coach**](/en/moasure/measuring-technique/use-moasure-coach.md) to understand what affected your accuracy and how to improve.

Moasure Coach highlights specific parts of your measurement and provides guidance on:

* Where accuracy dropped
* What caused it (e.g. movement, placement, timing)
* How to correct it in your next measurement

Improve your technique and remeasure for better results.

***

### **Key Tips**

* Pause regularly and within the **green zone**
* Avoid rushing or stopping abruptly


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