Tools
Config-driven calculators and helpers—each tool doubles as an explainer page for search and sharing. Jump into a subject hub or scroll the full catalog.
By subject
Same grouping as your curriculum—e.g. chemistry calculators in one place.
All tools
Alphabetical list of published utilities Showing 337–384 of 564.
- formula calculator
Momentum
p = mv.
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Motion graph visualizer
Sketch x(t)=ut+½at² for chosen u, a, and t range.
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Mutation impact (guide)
Silent, missense, nonsense, frameshift overview.
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Mutation rate estimate
Mutations per site per generation.
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NEET attempt analyzer
Accuracy and attempt mix from counts.
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NEET biology score (illustrative)
+/− marking sketch for biology section.
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NEET chemistry score (weighted toy)
Weighted average across sections — not official scoring.
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NEET physics score (illustrative)
Same illustrative negative-marking helper for physics MCQs.
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NEET rank toy model
Illustrative rank from percentile.
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NEET section mark share
Biology vs physics vs chemistry % from mark totals.
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Nernst equation calculator
Cell potential E from E°, n, T (K), and reaction quotient Q using E = E° − (RT/nF) ln Q.
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Net force (1D)
Sum three signed force components on one axis.
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Neuron signal speed
distance / time.
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Neutralization calculator
Volume or mole balance for acid–base neutralization with optional stoichiometric z.
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Newton–Raphson calculator
Real root of f(x)=0 (numeric).
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Normal distribution calculator
CDF P(X ≤ x) for N(μ,σ²).
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Normal force
Flat surface N = mg; incline N = mg cos θ.
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Normality calculator
Calculate normality (eq/L) from equivalents and volume, or from molarity and equivalents per mole.
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Notes outline
Topic skeletons to expand into your own notes.
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Nuclear decay (exponential)
N = N₀ e^(−λt) with λ from half-life.
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Number base converter
Bases 2–16, integer only.
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Numerical methods (bisection)
Bracketed root on [a,b].
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Nutrient deficiency hints
Rough leaf symptom patterns.
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Octal calculator
Integer + − × in base 8.
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ODE solver (Euler)
dy/dx = f(x,y) with Euler steps.
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Ohm’s law
Solve V = IR for V, I, or R.
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Oligo Tm (Wallace)
Wallace rule for short DNA oligos.
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One-sample t statistic
t vs hypothesized mean — compare to table.
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Optical power (diopters)
P = 1/f with f in meters.
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Optics ray diagram (lite)
Thin-lens v, m, and a two-ray schematic from u, f, h.
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Optimization (interval)
Approximate min and max of f on [a,b] by sampling.
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Orbital diagram (one subshell)
Text boxes for one subshell with Hund’s rule and pairing.
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Orbital speed (circular)
v = √(GM/r) for a circular orbit.
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Organelle functions
Short eukaryotic organelle roles.
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Organ functions (reference)
Major organ roles overview.
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Osmosis comparison
Toy inside vs outside concentration comparison.
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Osmotic pressure calculator
π = iMRT from molarity (mol/L), temperature (K), and i.
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Oxidation state calculator
One unknown element with default rules (O, H, F, group 1/2…).
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Oxidizing / reducing agent strength
Compare standard reduction potentials from a teaching table.
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Oxygen saturation
Why SpO₂ needs measurement.
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Parallel-plate capacitor
C = ε₀ εᵣ A / d.
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Parallel resistors (two)
Two-branch equivalent resistance.
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Parametric graph plotter
x(t), y(t) as polynomials in t.
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Partial derivative calculator
∂f/∂x or ∂f/∂y for f(x,y).
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Partnership calculator
Profit share ∝ investment × time.
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Pathway databases (pointer)
KEGG, Reactome, WikiPathways.
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PCR primer dilution
C₁V₁ = C₂V₂ for stock to working concentration.
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Pendulum period
T = 2π√(L/g) small-angle approximation.
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