UD5 Toolkit
Density Calculator – Find Mass, Volume or Density ρ=m/V
Calculate density, mass, or volume of a material. Input two known values to find the third. Supports g/cm³, kg/m³, lb/ft³ and other common density units.
Science Simulations & Calculators
10+ toolsConway's Game of Life – Draw & Simulate Custom Patterns
Click to draw cells, then run the simulation. Includes pre‑built patterns like gliders and Gosper glider gun. Pause and edit while running.
Science Fair Project Idea Generator – By Grade Level
Select your grade and get a random science experiment idea with a hypothesis, materials list, and procedure. Perfect for last‑minute fair prep.
Density of Everyday Objects – Online Will It Float?
Select common materials (wood, plastic, metals) and see density chart. Predict floating. Fun science.
Electromagnetic Spectrum Explorer - Online Wavelengths
Zoom through the electromagnetic spectrum from radio waves to gamma rays. See wavelength, frequency, and applications. Static educational page.
Virtual Microscope - Online Biology Slide Viewer
View pre‑loaded virtual microscope slides of onion cells, leaf epidermis, etc. Zoom and pan like a real microscope.
Solar System Scale Model - Online Visual Comparison
See planets and orbits at true scale (or logarithmic). Scroll from the Sun to Pluto. Understand space distances. Canvas.
Virtual Frog Dissection - Online Biology Anatomy Lab
Step‑by‑step virtual frog dissection with labeled organs. No mess, ethical. Great for remote learning.
ISS Tracker - Online Live Where is Space Station
See the International Space Station’s current position on a world map in real time. Uses public API. No refresh.
Daily Space Picture - Online Astronomy Photo of the Day
View the NASA Astronomy Picture of the Day (APOD) directly in your browser. Read the explanation. No API key needed.