Pool Tools

Quantity Calculator

Surface area = bottom + four walls | Perimeter = top edge
Volume = L × W × D × 7.48 gal/cu ft

Estimate how much salt to add based on current salinity and target salinity.

Units:

Pool Volume (gal):

Current Salt (ppm):

Target Salt (ppm):

Salt to Add (lbs): 0

40 lb bags: 0

Formula (imperial): pounds = gallons × desired ppm increase × 0.000008345

Date:

Pool / Customer:

Parameter	Ideal	Range
pH	7.4	7.2 – 7.8
Free Chlorine ppm	2	2 – 4
Alkalinity ppm	100	80 – 120
Calcium Hard. ppm	300	200 – 400
Conditioner ppm	40	30 – 50
Salinity ppm	3200	3200 – 3400

Notes (optional):

Saved to pool_logs.db (SQLite) on your server.

Date	Pool / Customer	pH	FC	ALK	CH	CYA	Salt
2026-03-18	Asker	7.4	2	0	0	0	2000
Notes: Delivered two bags added existing four to pool serviced filter muddy
2026-03-18	Narcissian	7.4	2	0	0	0	0
Notes: Added five bags left three
2026-03-17	Lewis	7.4	2	0	0	0	250
Notes: Delivered eight bags brushed in six
2026-03-17	Salt day sequoia	7.4	2	100	250	0	2200
Notes: Delivered 10 bags adding 8