Tidal Zone
Science fiction is physics wearing better costumes. Each of these takes a scene seriously enough to compute it, and most scenes do not survive the arithmetic — the ones that do are the interesting part.
Newest in this category
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Dune Sandworm Intercept Calculator
Calculate when a sandworm arrives and if your team can mount it in time - a fun Arrakis timing puzzle.
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I Ching Divination Mechanics
Cast an I Ching hexagram by coin or by yarrow stalk and watch the two methods disagree. The 64 hexagrams are the 64 six-bit numbers, which Leibniz noticed in 1703, and the two traditional casting methods do not produce the same distribution.
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Biorhythm Calculator
Plot physical, emotional, and intellectual biorhythm cycles from birth date to any target date.
Problems solved in full
What you find out here
- The three curves were never one theory Biorhythm Calculator
- Your sign stopped matching the sky centuries ago Astrology Birth Chart
- The expected time is not the typical time Bitcoin Mining Probability
- The oracle is a six-bit number, and Leibniz said so in 1703 I Ching Divination Mechanics
- Nine days later, the same number — almost always Life Number Calculator
- The only unit in this grid with no sky behind it Life in Weeks
Every tool on this shelf
Astrology Birth Chart
Calculate your sun, moon, and rising signs from your birth date, time, and location. Interactive zodiac wheel visualisation.
Biorhythm Calculator
Plot physical, emotional, and intellectual biorhythm cycles from birth date to any target date.
Bitcoin Mining Probability
Estimate block-finding probability from hashrate, network difficulty, and time.
Death Star Energy Calculator
How much energy does it take to destroy a planet? Calculate gravitational binding energy and compare it to real-world scales.
Dune Sandworm Intercept Calculator
Calculate when a sandworm arrives and if your team can mount it in time - a fun Arrakis timing puzzle.
I Ching Divination Mechanics
Cast an I Ching hexagram by coin or by yarrow stalk and watch the two methods disagree. The 64 hexagrams are the 64 six-bit numbers, which Leibniz noticed in 1703, and the two traditional casting methods do not produce the same distribution.
Life in Weeks
Visualize your entire life as a 100-year grid of weeks — see how many you've lived and how many remain.
Life Number Calculator
Compute a numerology life number from birth date and see playful interpretations.
Lucky Number Generator
Generate personal lucky numbers from a birthdate, draw size, and number range using numerology and zodiac-style folklore.
Name Compatibility Calculator
Turn two names into a numerology-style compatibility score using a deterministic letter-value formula - for fun, not for relationship advice.
Neon Lightcycle Duel
TRON-inspired grid duel: watch two AI strategies compete for territory, or play step-by-step with full move analysis before each decision.
Numerology Name Calculator
Convert any name to its numerology number using each letter's position in the alphabet. See each letter's value and the final reduced life path number.
Pattern Sequence Test
Complete a run of abstract figure sequences (5-20 rounds) and see if your score beats random guessing — scored with exact binomial statistics.
Star Trek Stardate + Warp Visualizer
Convert dates and stardates, and estimate warp travel time with a clear warp curve view.
Stargate Address Math Dialer
Build a Stargate address by clicking real glyphs, watch 9 chevrons lock one by one, and explore the permutation math behind how many addresses are possible.
Wasteland Signal Mixer
Mix harmonics and noise to reconstruct a target signal in a post-apocalyptic radio game.