Larval Days To Spinning Total

Sum caller feeding, intervening molt and spinning-delay durations into a UTC calendar forecast, rounding up fractional completion days; no embedded strain-development schedule.

Description

Larval feeding instars are separated by molts.

Larval feeding instars are separated by molts. Durations in days and hours must be combined on one calendar basis.

Sum caller feeding, intervening molt and spinning-delay durations into a UTC calendar forecast, rounding up fractional completion days; no embedded strain-development schedule.

When to use Larval Days To Spinning Total

Use this tool to sum caller feeding, intervening molt and spinning-delay durations into a UTC calendar forecast, rounding up fractional completion days; no embedded strain-development schedule.

Prepare cocoon, larval, leaf or reeling measurements on a consistent batch and moisture basis. Use the declared mass, length and time units.

How to use Larval Days To Spinning Total and understand its results

Prepare cocoon, larval, leaf or reeling measurements on a consistent batch and moisture basis. Use the declared mass, length and time units.
Enter feedingDurationsDays, moltDurationsHours, postFinalFeedToSpinningHours, larvalStartDate using the field table and calculation rules, then run the tool.
Read totalLarvalDays, modeledSpinningDate. The explanation below defines the units, signs, ordering and any flags or placeholder values.
If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.

Input field	Meaning	Value type; see rules below	Requirement
feedingDurationsDays	Feeding durations days	list of number	Required
moltDurationsHours	Molt durations hours	list of number	Required
postFinalFeedToSpinningHours	Post final feed to spinning hours	number	Required
larvalStartDate	Larval start date	string	Required

Use nonnegative durations, a nonempty feeding list and exactly one molt between feeding stages. Sum the durations, round completion days upward and shift the valid start date on a UTC calendar.^[1]

total days = sum feeding days + (sum molt hours + final delay hours)/24

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
totalLarvalDays	Total larval days	number
modeledSpinningDate	Modeled spinning date	string

json

{
  "input": {
    "feedingDurationsDays": [
      2,
      3,
      4
    ],
    "moltDurationsHours": [
      12,
      24
    ],
    "postFinalFeedToSpinningHours": 12,
    "larvalStartDate": "2026-10-01"
  },
  "output": {
    "totalLarvalDays": 11,
    "modeledSpinningDate": "2026-10-12"
  }
}

Limitations and assumptions

Durations are supplied; no strain-specific schedule or realized spinning date is guaranteed.

Numbers and computed results must be finite; overflow produces an error. Numeric lists are limited to 100,000 entries; the rules above may require smaller limits. Extremely large text inputs are rejected. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.

Alternative or Complementary methods

Use Instar Molt Wake Hours: Interpolate an observed cohort wake-fraction crossing after molt start; missing or nonunique crossings are censored/ambiguous rather than assigned reference molt hours. For a complementary task, use Castor Eri Leaf Consumption Cycle: Plan eri castor-leaf demand from stage duration, expected survival and measured per-larva consumption plus leftovers; distinct from observed leaf/cocoon harvest FCR.

References

Larval Days To Spinning Total — tool.io

Similar or alternative tools

Instar Molt Wake Hours
Interpolate an observed cohort wake-fraction crossing after molt start; missing or nonunique crossings are censored/ambiguous rather than assigned reference molt hours.
Castor Eri Leaf Consumption Cycle
Plan eri castor-leaf demand from stage duration, expected survival and measured per-larva consumption plus leftovers; distinct from observed leaf/cocoon harvest FCR.