1. What is an Australian Standard Timber Sizes Calculator?

Definition: This calculator estimates the volume of timber based on Australian standard sizes (e.g., 90×45 mm, 140×35 mm).

Purpose: It helps builders, carpenters, and DIYers determine timber volume for construction projects using standard Australian dimensions.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V \) — Volume of timber (cubic meters)
• \( L \) — Length (meters)
• \( W \) — Width (meters, e.g., 0.09 m for 90mm)
• \( T \) — Thickness (meters, e.g., 0.045 m for 45mm)

Explanation: The formula multiplies the three dimensions to calculate the volume in cubic meters.

3. Common Australian Standard Timber Sizes

Common Sizes:

• 90 × 45 mm (0.09 × 0.045 m)
• 140 × 35 mm (0.14 × 0.035 m)
• 190 × 35 mm (0.19 × 0.035 m)
• 70 × 35 mm (0.07 × 0.035 m)

4. Using the Calculator

Tips: Enter the length in meters and standard width/thickness in meters (default 90×45mm). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why use meters instead of millimeters?
A: The calculator uses meters for consistency with volume measurements (m³), but you can enter millimeter values as decimals (e.g., 90mm = 0.09m).

Q2: What's the difference between nominal and actual sizes?
A: Nominal sizes (e.g., 90×45) refer to dressed dimensions, while actual sizes may be slightly smaller after planing.

Q3: How do I calculate for multiple pieces?
A: Calculate volume for one piece then multiply by the quantity needed.

Q4: Does this account for timber shrinkage?
A: No, consider adding 2-5% extra for natural timber shrinkage over time.

Q5: How do I convert to board feet?
A: 1 m³ ≈ 423.776 board feet (1 board foot = 1 ft × 1 ft × 1 in).