Calculator Inputs
Enter project-wide green area and population. Add scenario adjustments to test compliance targets and design alternatives.
Example Data Table
Sample districts show how area and population affect per-person provision.
| Area / Zone | Green area | Unit | Population | m² per person |
|---|---|---|---|---|
| District A | 120.00 | ha | 180,000 | 6.67 |
| District B | 42.00 | ha | 95,000 | 4.42 |
| District C | 2.60 | km2 | 310,000 | 8.39 |
| District D | 65.00 | acre | 42,000 | 6.26 |
Formula Used
The calculator converts every area input to square meters, then computes per-person provision:
- Net Green Area (m²) = (Current + Added − Lost) × Unit Conversion
- Green Space per Capita (m²/person) = Net Green Area ÷ Population
- Projected Population = Population × (1 + Growth%)Years
- Projected m²/person = Net Green Area ÷ Projected Population
- Extra Area Needed = (Target × Projected Population) − Net Green Area (only if below target)
Using net area avoids double-counting, and the projection helps test future compliance.
How to Use This Calculator
- Enter current green area and select the correct unit.
- Add expected new green area and any planned losses.
- Enter the population served by the development or district.
- Set a per-person target from your standards or briefs.
- Optionally add growth and years to test future scenarios.
- Press Submit to view results above the form.
- Download CSV or PDF from the results panel.
Planning Notes
Baseline provision checkpoints
Green space per capita is typically reported in square meters per resident. Many urban briefs set working bands of 9–15 m²/person for neighborhood-scale projects, while district plans may target higher values when regional parks are included. Use this calculator to test your current position and a chosen target side by side. For quick comparisons, multiply m²/person by 1,000 to express green space per 1,000 residents in dashboards and reports.
Area accounting and conversion
The model converts every input to m², so mixed reporting stays consistent. Useful reference factors: 1 hectare = 10,000 m², 1 acre ≈ 4,046.86 m², and 1 km² = 1,000,000 m². When auditing drawings, separate planted roofs, pocket parks, buffers, and accessible lawns to avoid overstating usable provision.
Quality control improves with a consistent inclusion rule: count publicly accessible areas, and label restricted or seasonal spaces separately. In construction schedules, track temporary losses during staging and reinstatement after completion. Recording these phases makes the “Lost area” input meaningful and keeps stakeholder reporting defensible.
Scenario adjustments for design options
“Added area” and “Lost area” let you compare alternatives without re-entering the base figure. For example, adding 2 ha to a 120 ha inventory increases area by 20,000 m². At 180,000 residents, that change alone raises provision by 0.11 m²/person, which can be the difference between meeting and missing a tight requirement.
Population growth sensitivity
Per-capita provision declines as population rises if green area stays fixed. With 2% annual growth over 10 years, population multiplies by about 1.219. A site providing 10.0 m²/person today would fall to roughly 8.2 m²/person at the same area, helping teams justify phased park delivery or land banking.
Target gap and land budgeting
The calculator reports the gap against your target and, when below target, estimates extra area needed: (target × projected population) − net area. This output supports early feasibility: translate the additional m² into parcels, roof decks, or linear green corridors, then iterate until the gap closes.
FAQs
What should be counted as green space?
Include publicly accessible parks, planted setbacks, community gardens, green roofs that people can use, and landscaped courtyards. Track restricted, private, or temporary planting separately so your per-capita result reflects usable provision and withstands review.
Which area unit should I use?
Choose the unit that matches your drawings or inventory. The calculator converts everything to square meters internally, so hectares, acres, and square kilometers remain comparable. Keep the same unit for current, added, and lost area fields.
How do I pick a target m² per person?
Use the requirement stated in your client brief, planning policy, or internal sustainability standard. If none exists, set a provisional target and test scenarios, then update it once the project’s compliance framework is confirmed.
Why does the projected value drop even when green area stays constant?
Per-capita provision is a ratio. When population increases through annual growth, the denominator grows while the green area stays fixed, so m²/person decreases. The projection helps you assess future compliance and phase green delivery.
How do I handle daytime population or mixed-use projects?
Use the primary population your approval process requires, such as residents, workers, or combined users. If you need multiple views, run the calculator twice with different population inputs and compare the exported summaries in your report.
Can I share results with stakeholders?
Yes. After you submit, use the CSV download for spreadsheets and the PDF download for a meeting-ready summary. The exports are generated from your latest calculation stored in the current session.