Essential measurements, conversions, and spacing guidelines for urban gardens
Master Garden Measurements
Accurate measurements are crucial for successful garden planning. This comprehensive guide covers everything from space calculations to plant spacing requirements, soil volume estimates, and unit conversions. Use these tools and reference tables to plan your perfect urban garden.
Essential Measuring Tools
Tape Measure
25-foot retractable tape for measuring space dimensions and layouts
Measuring Apps
Smartphone apps for quick measurements and area calculations
Scale
Digital scale for measuring soil, fertilizer, and harvests
Measuring Cups
For precise watering, fertilizing, and soil amendments
Unit Converter
Convert Between Common Units
Plant Spacing Requirements
Proper spacing ensures healthy plant growth and optimal yields. Here are recommended spacing guidelines:
| Plant Type | Spacing Between Plants | Row Spacing | Container Size |
|---|---|---|---|
| Tomatoes | 24-36 inches | 36-48 inches | 5-10 gallons |
| Peppers | 18-24 inches | 24-36 inches | 3-5 gallons |
| Lettuce | 6-12 inches | 12-18 inches | 1-2 gallons |
| Herbs (Basil, Parsley) | 6-12 inches | 12-18 inches | 1-3 gallons |
| Cucumbers | 12-24 inches | 36-60 inches | 5 gallons |
| Carrots | 2-4 inches | 12-18 inches | 12+ inches deep |
| Strawberries | 12-18 inches | 24 inches | 2-3 gallons |
| Beans (Bush) | 4-6 inches | 18-24 inches | 2-3 gallons |
| Spinach | 3-6 inches | 12 inches | 1-2 gallons |
| Radishes | 2-3 inches | 6-12 inches | 6+ inches deep |
Soil Volume Calculator
Calculate how much soil you need for your containers and raised beds:
Container Type
Dimensions (inches)
Soil Needed
0 gallons
Common Formulas:
Quick Reference: Common Measurements
Container Volumes
1 gallon = 231 cubic inches
5 gallon = 0.67 cubic feet
10 gallon = 1.34 cubic feet
Soil Bag Sizes
1 cubic foot bag = 7.5 gallons
2 cubic foot bag = 15 gallons
3 cubic foot bag = 22.5 gallons
Water Volume
1 gallon = 3.785 liters
1 liter = 0.264 gallons
1 cup = 236 ml
Weight Estimates
Dry potting soil: 40-60 lbs/cu ft
Wet potting soil: 80-100 lbs/cu ft
Water: 8.34 lbs/gallon
Measurement Checklist
✓ Before You Start Planting
Visual Spacing Guide
Interactive diagram showing proper plant spacing
💡 Pro Measurement Tips
- Always measure twice, cut once – accuracy prevents costly mistakes
- Account for plant growth – use mature size for spacing, not transplant size
- Leave 20-30% of space for pathways and access
- Round up when calculating soil needs to ensure you have enough
- Consider vertical space – many plants can grow up, not just out
- Factor in seasonal sun angle changes when planning permanent structures
- Keep a garden journal with measurements and observations
- Use stakes and string to visualize layouts before planting