Dive Equipment Maintenance Calculator

This calculator builds your annual scuba maintenance budget as a sum of six independent line items, each modeled on how that piece of gear actually gets serviced. The regulator is the only cost that scales with how much you dive: it divides your dives per year by 150 (rounded up, minimum one service) and multiplies by your quoted service price, since regs need attention annually or every 150 dives, whichever comes first. The BCD cost is simply your entered service price, unchanged. The reserve fund is a flat annual figure — a fixed $400 gear-replacement reserve is always added on top regardless of what your kit is actually worth, so treat that number as a rough placeholder rather than a true sinking-fund calculation.

Computer battery cost is smoothed by dividing your input by 1.5, reflecting a typical 18-month replacement cycle. Suit cost isn't a dollar figure you enter at all — it's driven entirely by the wetsuit/drysuit toggle, which sets a fixed $20 for wetsuits or $150 for drysuits (needing seal and valve service), so switching that toggle is the only way to change this line item. Tank costs include an annual visual inspection for every tank you own, plus a hydrostatic-test charge that only appears in years where tank age is an exact multiple of five — meaning your total cost will spike every fifth year rather than smoothing that expense out, despite the code's own comment calling it "amortised." Misc costs (o-rings, small parts) scale roughly with dive count. Use the per-dive figure to budget realistically, but expect real-world costs to be lumpier in hydro-test years than the average suggests.