Net Mending Cost Calculator
Repair time and material from damage assessment.
About this calculator
This calculator estimates what it actually costs to mend a damaged fishing net rather than replace it outright. It first converts your reported damage percentage into a physical damage area (net area times damage percent), then applies a fixed mending rate of 2 square meters per hour — a reasonable pace for an experienced net mender working by hand — to derive labor hours, which are multiplied by your hourly labor rate for labor cost. Material cost follows a similar path: twine consumption per square meter of repaired area times the damaged area gives total twine needed, multiplied by twine cost per kilogram. Total repair cost is simply labor plus materials.
The calculator then benchmarks that against a rough replacement cost, assuming new netting runs about $15 per square meter of damaged area, and reports the difference as your repair-versus-replace savings — a genuinely useful sanity check, since badly damaged, aging, or already-patched netting can sometimes cost more to mend by the time you account for mender time than to simply cut in a new panel. Two things worth knowing: the fixed 2 sq m/hr mending rate and $15/sq m replacement benchmark are broad industry rules of thumb baked into the formula, not figures pulled from your specific net type, mesh size, or local labor market, so treat the comparison as directional rather than a firm quote. If your net uses an unusually fine mesh or heavy-duty material, actual mending time and replacement cost could both run meaningfully higher than shown here.
Inputs
Results
Total repair cost ($)
$520.00
≈ 9 tanks of gas
How to Use This Calculator
- Enter Net area (sq m), Damage %, and Labor rate ($/hr).
- Set Twine (kg/sq m) and Twine cost ($/kg).
- Review the Total repair cost ($) ($) result.
- Use Labor hours and Labor cost ($) ($) to inform your decision.
How the result changes with Net area (sq m)
| Net area (sq m) | Total repair cost ($) |
|---|---|
| 250 | $260.00 |
| 375 | $390.04 |
| 750 | $780.00 |
| 1,250 | $1,300.00 |
What each input means
- Net area (sq m)
- Total area of the fishing net.
- Damage %
- Percentage of net area requiring repair.
- Labor rate ($/hr)
- Net mender hourly wage.
- Twine (kg/sq m)
- Twine consumption per square meter of repair.
- Twine cost ($/kg)
- Cost of nylon or polyethylene twine per kg.
What each result means
- Total repair cost ($)
- Total labor plus materials for mending.
- Labor hours
- Estimated mending time.
- Labor cost ($)
- Labor cost for mending.
- Material cost ($)
- Twine and supplies cost.
- Repair savings ($)
- Cost savings of repair vs buying new netting.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersNet area (sq m) = 500, Damage % = 10, Labor rate ($/hr) = 20, Twine (kg/sq m) = 0.05 = 5 input(s) provided
- Calculate Total repair costTotal repair cost = laborCost + materialCost520 = $520
- Calculate Labor hoursLabor hours = round((damageAreaSqM / mendingRate) * 100) / 10025 = 25
- Calculate Labor costLabor cost = round(laborHours * laborRatePerHr * 100) / 100500 = $500
Engine last updated . Checked against 2 independently-derived tests — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.
Frequently Asked Questions
How is labor cost calculated from the damage percentage I enter?
The calculator first multiplies total net area by your damage percentage to get the damaged area in square meters, then divides that by a fixed mending rate of 2 square meters per hour to get labor hours. Labor hours is then multiplied by your entered hourly labor rate to get labor cost, so doubling the damage percentage doubles both labor hours and labor cost.
Why is the replacement cost benchmark based on damaged area, not the full net?
The repair-versus-replace comparison assumes you'd only need to cut in a new panel covering the damaged area, at roughly $15 per square meter, rather than replacing the entire net. This keeps the comparison apples-to-apples against the repair cost, which is also scoped to just the damaged area — it isn't estimating the cost of a whole new net.
What could make real-world mending costs differ from this estimate?
The fixed 2 sq m/hour mending rate and $15/sq m replacement benchmark are generic industry rules of thumb, not figures tied to your specific mesh size, twine material, or local labor market. A very fine mesh takes longer to mend by hand than the same area of coarse mesh, and heavy-duty or specialty netting typically costs more than $15/sq m to replace, so both figures should be treated as directional estimates.
How is material cost different from labor cost in the total repair figure?
Material cost comes from a separate calculation: damaged area times your twine-consumption rate (kg of twine per sq m) gives total twine needed, which is then multiplied by twine cost per kilogram. Total repair cost is simply labor cost plus this material cost added together, so a net that's cheap to re-twine but slow to mend by hand can still end up expensive overall if labor rates are high.
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