Cord of Firewood Calculator
Calculate exactly how much firewood you need for heating season. Our cord of firewood calculator helps you estimate cords, face cords, and ricks based on your wood dimensions.
Enter Wood Stack Dimensions
Measure your wood stack or estimate dimensions for your firewood needs.
Firewood Calculation Results
Your firewood volume in different cord measurements:
Total Cords of Firewood
Weight Estimation
Standard Cord Visualization
A standard cord measures 4 feet high × 4 feet wide × 8 feet long
Note: This represents the stacked volume, not solid wood. Air spaces between logs reduce solid wood volume by 30-40%.
Cord Measurement Comparison
| Measurement | Dimensions | Volume | Common Use |
|---|---|---|---|
| Full Cord | 4′ × 4′ × 8′ | 128 cu ft | Standard measurement |
| Face Cord | 4′ × 8′ × log length | Varies | Common retail unit |
| Rick | Varies by region | Typically 1/3 cord | Regional measurement |
| Fireplace Cord | 4′ × 4′ × 12″ | 16 cu ft | Smaller bundles |
Complete Guide to Cord of Firewood Measurement and Calculation
Our comprehensive cord of firewood calculator helps homeowners, wood stove users, and firewood suppliers accurately measure and estimate firewood quantities. Understanding cord of firewood measurements is essential for buying, selling, and using firewood efficiently for heating and recreational purposes.
What is a Cord of Firewood?
A cord of firewood is a standard unit of measurement for stacked firewood, legally defined in most states and countries as 128 cubic feet of stacked wood. This typically measures 4 feet high × 4 feet wide × 8 feet long. Our cord of firewood calculator helps you determine exactly how much wood you have or need based on your specific stack dimensions.
Standard Firewood Measurements Explained
When using our cord of firewood calculator, it’s important to understand different firewood measurements:
| Measurement | Standard Dimensions | Cubic Feet | Fraction of Full Cord | Common Log Length |
|---|---|---|---|---|
| Full Cord | 4′ × 4′ × 8′ | 128 cu ft | 1.00 cord | 16″, 18″, 24″ |
| Face Cord | 4′ × 8′ × log length | Varies (typically 42-64 cu ft) | 1/3 to 1/2 cord | 12″ to 24″ |
| Rick | Varies regionally | Typically 40-45 cu ft | ~1/3 cord | Varies |
| Fireplace Cord | 4′ × 4′ × 12″ | 16 cu ft | 1/8 cord | 12″ to 18″ |
How to Calculate Cords of Firewood
Our cord of firewood calculator uses a simple formula to determine cord measurement:
Firewood Calculation Formula
Cords = (Length × Width × Height) ÷ 128
Where:
• Length, Width, and Height are in feet
• 128 is the cubic feet in a standard cord
• Result is the number of full cords
Example: A wood stack measuring 6 feet long × 3 feet wide × 4 feet high:
Volume = 6 × 3 × 4 = 72 cubic feet
Cords = 72 ÷ 128 = 0.56 cords (about half a cord)
Frequently Asked Questions: Cord of Firewood
A full cord measures 4′ × 4′ × 8′ (128 cubic feet), while a face cord is typically 4′ high × 8′ long, with the depth equal to the length of the logs (usually 16″ to 24″). This means a face cord is generally 1/3 to 1/2 of a full cord. Always clarify dimensions when buying firewood to ensure you’re getting what you expect.
The weight of a cord of firewood varies significantly by wood type and moisture content:
• Green (unseasoned) hardwood: 4,000-5,000 pounds
• Seasoned hardwood: 2,000-3,000 pounds
• Pine and softwoods: 1,500-2,500 pounds (seasoned)
Our cord of firewood calculator provides weight estimates based on wood type selection.
The duration a cord of firewood lasts depends on several factors:
• Heating needs: Primary heat vs. occasional use
• Home size and insulation
• Wood stove or fireplace efficiency
• Wood type and moisture content
• Climate and outdoor temperatures
As a general guideline, a cord typically lasts 6-10 weeks as primary heat for a 1,500 sq ft home, or a full season for occasional recreational use.
Proper storage is essential for firewood:
1. Elevate wood off the ground using pallets or rails
2. Cover the top with a tarp or roof, but leave sides open for airflow
3. Stack neatly with air gaps between logs
4. Location should be sunny and well-ventilated
5. Avoid stacking against your house (pests and moisture issues)
Properly seasoned wood should have 15-20% moisture content for optimal burning.
Wood Types and Heating Values
Different wood types provide varying amounts of heat per cord. Our cord of firewood calculator accounts for these differences in weight and BTU estimates:
| Wood Type | BTU per Cord | Weight per Cord (Seasoned) | Seasoning Time | Best Use |
|---|---|---|---|---|
| Oak | 24-28 million BTU | 3,200-3,800 lbs | 12-24 months | Long-lasting overnight heat |
| Maple | 22-25 million BTU | 2,800-3,400 lbs | 9-18 months | General heating |
| Birch | 20-24 million BTU | 2,600-3,200 lbs | 6-12 months | Quick hot fires |
| Pine | 15-18 million BTU | 1,800-2,400 lbs | 6-9 months | Kindling, shoulder season |
| Mixed Hardwood | 18-22 million BTU | 2,500-3,200 lbs | 9-18 months | General purpose |
Tips for Buying and Measuring Firewood
Use our cord of firewood calculator to verify you’re getting what you pay for:
- Measure before buying: Use the calculator to verify claimed cord amounts
- Understand local terms: “Rick,” “face cord,” and “stove cord” vary regionally
- Check moisture content: Seasoned wood should be under 20% moisture
- Look for proper seasoning: Cracks on log ends, gray color, light weight
- Buy in spring: Better prices and time for additional seasoning if needed
- Stack and measure: Always stack delivered wood to verify volume
- Use our calculator: For irregular stacks, measure multiple sections and add results
How to Measure Irregular Wood Piles
For non-rectangular wood piles, use these techniques with our cord of firewood calculator:
- Divide and conquer: Break irregular piles into rectangular sections
- Average dimensions: For tapered piles, average the top and bottom widths
- Circular piles: Measure diameter, calculate area as π × radius²
- Account for air space: Stacked wood has 30-40% air space between logs
- Compare to known standard: Compare your pile to a 4′ × 4′ × 8′ mental image
Legal Standards for Firewood Measurement
In the United States, the cord of firewood is legally defined as 128 cubic feet of stacked wood. Many states require firewood to be sold by the cord or fractions thereof, with specific labeling requirements. When in doubt, use our cord of firewood calculator to verify measurements and ensure you’re getting fair value for your purchase.
Seasoning and Storing Your Firewood
Properly seasoned wood burns hotter, cleaner, and more efficiently. Follow these guidelines:
- Split wood promptly: Splitting exposes more surface area for drying
- Stack properly: Create stable stacks with good air circulation
- Cover from rain: Use a tarp or roof, but don’t wrap tightly
- Allow time: Hardwoods need 12-24 months to season properly
- Check moisture: Use a moisture meter to verify <20% before burning
- Store away from house: Reduces pest issues and moisture transfer
Our cord of firewood calculator is an essential tool for anyone who heats with wood, sells firewood, or plans their winter fuel supply. By accurately calculating your firewood needs, you can save money, ensure adequate heating supply, and make informed purchasing decisions. Remember that actual heating value depends on wood type, seasoning, and burning efficiency, so consider these factors alongside volume calculations.
Important Safety and Legal Notes
This cord of firewood calculator provides estimates based on standard industry measurements. Actual wood volume may vary based on stacking technique, log straightness, and bark content. Always verify firewood measurements when buying or selling, and be aware of local regulations regarding firewood sales and transportation. Burning firewood produces particulates; ensure your stove or fireplace meets local emissions standards.