Swimming Pool Volume Calculator South Africa
Calculate your swimming pool volume in litres and m³. Get chemical dosing quantities, cost to fill from municipal water, fill time, and annual operating cost estimates for South African pools.
Quick Calculator Get a fast estimate
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For circular pools, enter the diameter
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Pool Volume (litres)
44 800 L
Volume (m³ / kL)
44.80 m³
Average Depth
1.40 m
Surface Area
32.0 m²
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How to Calculate Swimming Pool Volume
Select your pool shape, enter the dimensions, and specify the shallow and deep end depths. The calculator uses the correct formula for each shape:
Rectangle: L × W × avg_depth × 1,000 litres
Circular: π × r² × avg_depth × 1,000 litres
Oval: L × W × 0.785 × avg_depth × 1,000 litres
Kidney: L × W × 0.675 × avg_depth × 1,000 litres
Average depth = (shallow end + deep end) ÷ 2
The Extended Calculator adds chemical dosing, filling cost by SA municipality, and fill time. The Professional Calculator covers full annual operating costs including heating, evaporation, and maintenance.
Need more detail?
Extended Calculator More options, charts, and scenario comparison
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L/hr
Standard garden hose: ~1,000 L/hr
Pool Volume
44 800 L
Volume in m³
44.80 m³
Cost to Fill (municipal)
R 538 – R 1 568
Fill Time (garden hose)
1.9 days
Chemical Dosing Guide (Initial Fill)
| Chemical | Dose | Est. Cost |
|---|---|---|
| Chlorine (shock) | 896 g | R 36 |
| pH Minus | 448 g | R 13 |
| pH Plus | 672 g | R 24 |
| Algaecide | 224 mL | R 18 |
| Total Chemicals | ≈ R 91 |
Initial fill dosing only. Ongoing weekly maintenance will vary. Always test water before adding chemicals.
Common South African Pool Sizes & Volumes
| Size | Shape | Avg Depth | Volume | Fill Cost (JHB) |
|---|---|---|---|---|
| Small (6×3m) | Rectangle | 1.4m | 25,200 L | ~R300–R840 |
| Standard (8×4m) | Rectangle | 1.4m | 44,800 L | ~R540–R1,568 |
| Large (10×5m) | Rectangle | 1.5m | 75,000 L | ~R900–R2,625 |
| Round (5m dia.) | Circular | 1.4m | 27,489 L | ~R330–R963 |
| Plunge (3×3m) | Rectangle | 1.5m | 13,500 L | ~R162–R473 |
SA Municipal Water Rates for Pool Filling (2026)
| Municipality | Low Tariff (R/kL) | High Tariff (R/kL) | Cost: 45kL pool |
|---|---|---|---|
| Johannesburg | R12 | R35 | R540 – R1,575 |
| Cape Town | R12 | R53 | R540 – R2,385 |
| eThekwini (Durban) | R10 | R30 | R450 – R1,350 |
| Tshwane (Pretoria) | R10 | R30 | R450 – R1,350 |
Filling a pool typically triggers higher tariff tiers. Most households move to Step 3–5 pricing for the fill month.
SA Pool Chemical Standards
SANS target ranges for residential pools:
Free Chlorine: 1.0 – 3.0 ppm (maintain closer to 2.0 ppm in summer)
pH: 7.2 – 7.6 (ideal: 7.4)
Total Alkalinity: 80 – 120 ppm
Calcium Hardness: 200 – 400 ppm
Cyanuric Acid (stabiliser): 30 – 50 ppm (outdoor pools)
Tip: Test water at least twice per week in summer and once per week in winter.
Need full precision?
Professional Calculator Complete parameters, sensitivity analysis, and detailed breakdown
Pool Details
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m
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Running Costs
R
SA Eskom 2026 avg ~R3.50/kWh
R
SA average ~R22/kL (Step 3 tariff)
kW
Typical 0.75kW–1.5kW
hrs
Heating
°C
°C
Total Annual Pool Operating Cost
R 18 239/year
Pool Volume
44 800 L
Surface Area
32.0 m²
Pump Electricity/month
R 630 (180 kWh)
Annual Electricity
R 7 924
Annual Chemicals
R 6 451
Annual Water (top-up)
R 1 364 (62 kL)
Service Calls (est.)
R 2 500
Monthly Water Bill Impact
R 114/month (5.2 kL)
SA Pool Evaporation Estimates
Summer (6mm/day): 192 L/day
Winter (2mm/day): 64 L/day
Annual evaporation: 46 kL (R 1 021)
Annual backwash: 16 kL (R 343)
A pool cover reduces evaporation by up to 95% — saves approximately R 919/year in water costs.
Heating Cost to Raise Temp by 9°C
Energy required: 468 kWh
Electric element (COP 1): R 1 639
Heat pump (COP 4.5): R 364
Solar: ~Free (ongoing energy cost once installed)
Heat pump saves R 1 274 vs electric element for this heating cycle.
Frequently Asked Questions — Pool Volume Calculator SA
For a rectangular pool: Length × Width × Average Depth × 1,000 = litres. An 8m × 4m pool with 1m shallow end and 1.8m deep end has average depth 1.4m: 8 × 4 × 1.4 × 1,000 = 44,800 litres. Our calculator handles all shapes automatically including oval and kidney pools.
Filling a typical 45kL pool costs R540–R2,385 depending on your municipality. Johannesburg low tariff (R12/kL): R540; Cape Town high tariff (R53/kL): R2,385. Note: filling a pool usually triggers higher tier pricing for that month, so the effective cost is often higher than initial estimates.
South African pools evaporate 5–7mm of water per day in summer (Oct–Mar) and 1.5–3mm in winter. For a 32m² pool surface, that's 160–224 L/day in summer. Annually, expect 15,000–25,000 litres lost to evaporation alone — costing R330–R1,325 in water bills. A pool cover cuts evaporation by up to 95%.
Shock dose (initial fill or algae): 200g granular chlorine per 10,000L. For a 45kL pool: ~900g. Weekly maintenance: 50–100g per 10,000L. Always test pH first (ideal 7.2–7.6) — pH above 7.8 makes chlorine 40% less effective. Add chemicals at night or early morning with the pump running.
For a standard 8×4m pool, expect annual running costs of R6,000–R15,000: pump electricity R3,000–R6,000; chemicals R2,000–R4,000; water top-up R600–R2,000; service calls R1,500–R3,000. Heat pump users pay less on heating; solar users least. A pool cover reduces water and heating costs substantially.