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Calculator and technology
Legolas Arrow Calculator
By

A fantasy archery calculator inspired by Legolas. Estimate arrows fired, successful hits, damage dealt, missed shots, remaining arrows, and the time needed to empty a quiver.

Created: 9/8/2026
D&D 2024 Combat Pacing Calculator
By Valkyr

Calculate a party’s estimated average damage per round, total survivability, and recommended NPC health and damage output for a chosen combat duration.

Created: 9/8/2026
D&D 2024 Encounter Difficulty Calculator
By valkyr

Estimate Dungeons & Dragons 2024 encounter difficulty for enemy and boss fights using party levels, combat readiness, player attack profiles, enemy CR, enemy count, boss traits, and battlefield pressure.

Created: 9/8/2026
D&D 5e Encounter Difficulty Calculator
By valkyr

Calculate enemy and boss encounter difficulty using party levels, player combat capability, monster Challenge Ratings, monster counts, and boss traits.

Created: 9/8/2026
Fall Fatality Risk Estimator
By

An educational, non-clinical estimator that shows a broad, highly uncertain risk range for fatal injury after a fall. It is not medical advice and must not be used to judge whether a fall is survivable. If someone has fallen or may be in immediate danger, call emergency services now and do not move them unless there is immediate danger.

Created: 9/7/2026
Substance Safety & Mixing Risk Calculator
By

A private, local-only harm-reduction calculator that estimates mixing risk from alcohol, THC, and psychedelic substances. It does not convert, manufacture, or recommend combining drugs.

Created: 9/7/2026
Foam Cut Calculator
By JAMES

Calculate foam cutting costs using length, width, and approved height values in millimetres. Costs are calculated by volume in South African Rand.

Created: 9/7/2026
Volume Density Cost Calculator
By

Calculate volume, material mass, and total cost from length, height, width, density, and volume-based pricing.

Created: 9/7/2026