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Advanced SWP Calculator with Withdrawal Rate
By

Calculate the investment corpus required for your monthly SWP, choose the withdrawal start time and duration, view the annual withdrawal percentage, and track the projected balance with a graph.

Created: 9/8/2026
SWP Corpus Calculator
By

Calculate the investment corpus required to withdraw a fixed monthly amount for a chosen number of years, with a default annual return of 8% and tenure of 20 years.

Created: 9/8/2026
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