Length
Convert millimeters, meters, miles, and more.
Dashboard
Constants, formulas, and calculators for research.
Every scientific & mathematics calculator — algebra, statistics, geometry, matrices, and number theory — with reusable widgets for the units you convert most.
117 tools6 quick widgetsOffline · No sign-up
Quick convert
Instant unit conversion.
Live conversions with zero navigation. Pin the widgets you reach for most.
Temperature
Celsius, Fahrenheit, and Kelvin — accurate to the tenth.
Time
Milliseconds through years, accurately.
Energy
Joules, calories, and watt-hours.
Power
Watts, kilowatts, and horsepower.
Force
Newtons, kilonewtons, and pound-force.
Favorites
Pin tools and widgets from anywhere in this dashboard. They sync across your device.
Recent activity
Nothing yet. Convert or calculate on this dashboard and the last 100 actions appear here.
Most used
Popular calculators.
Math
Popular
Scientific Calculator
Evaluate expressions with trig, logs, powers, factorial, π, e.
Math
Popular
Percentage Calculator
What is X% of Y, X is what % of Y, and reverse.
Math
Popular
Fraction Calculator
Add, subtract, multiply, and divide fractions.
Math
Popular
Decimal to Fraction
Convert any decimal to a simplified fraction.
Chemistry
Popular
Molar Mass Calculator
Molar mass of any chemical formula.
Chemistry
Popular
Mole Calculator
Moles from mass and molar mass.
Chemistry
Popular
Mole Fraction Calculator
Mole fraction xᵢ = nᵢ / n_total.
Chemistry
Popular
Molecular Weight Calculator
Compute molecular weight from a formula.
Trending
Trending this week.
Math
Popular
Volume Calculator
Volume of common 3D solids.
Math
Popular
Standard Deviation Calculator
Sample or population standard deviation.
Math
Popular
Prime Factorization
Decompose any integer into prime factors.
Math
Popular
Scientific Calculator
Evaluate expressions with trig, logs, powers, factorial, π, e.
Chemistry
Popular
Ideal Gas Law Calculator
PV = nRT solver for any variable.
Chemistry
Popular
Combined Gas Law Calculator
P₁V₁/T₁ = P₂V₂/T₂ solver.
Chemistry
Popular
pH Calculator
pH = −log[H⁺] with acid/base classification.
Chemistry
Popular
Molarity Calculator
M = mol / L.
New
Recently added.
Math
Cross Product
Cross product of two 3D vectors.
Math
Dot Product
Scalar (inner) product of two vectors.
Math
Vector Subtraction
Subtract two vectors of equal length.
Math
Vector Addition
Add two vectors of equal length.
Chemistry
Popular
Ideal Gas Law Calculator
PV = nRT solver for any variable.
Chemistry
Popular
Combined Gas Law Calculator
P₁V₁/T₁ = P₂V₂/T₂ solver.
Chemistry
Percent Yield Calculator
% yield of a reaction.
Chemistry
Theoretical Yield Calculator
Predicted product mass.
Coverage
Tools per category
117 tools across 3 categories.
- Math64
- Chemistry21
- Physics32
Your usage
Most-used items
Aggregated from your recent activity on this device. Stays local unless you sync.
Use a widget or open a calculator — usage will appear here.
FAQ
About Scientific Dashboard.
Do widgets and history sync across dashboards?
Favorites and widget pins are global. History entries are tagged by dashboard so each dashboard shows only its own activity — with a global export available on the hub.
Are widgets accurate for professional use?
Every widget uses the same Universal Converter Engine that powers our full converter tools — deterministic factor + offset math, IEEE-754 rounding, and validated non-negative constraints where required.
Can I use this offline?
Yes. Every dashboard is fully offline-first — no external APIs are called for calculations. Installing the app to your home screen keeps it available with no network.
Do these calculators need an internet connection?
No. Every scientific, algebra, statistics, geometry, matrix, and vector calculator runs 100% client-side using pure math engines. Nothing is uploaded, cached, or logged, and the tools keep working once the page has loaded.
How precise are the results?
Every engine uses a shared Precision Engine that eliminates floating-point drift and formats extreme magnitudes with scientific notation. You can pick 0–15 decimal places on the scientific calculator.
Which functions does the Scientific Calculator support?
Standard operators (+, −, ×, ÷, ^, %, !), parentheses, constants (π, e, τ), and functions sin, cos, tan, asin, acos, atan, sinh, cosh, tanh, log, log2, ln, exp, sqrt, cbrt, abs, floor, ceil, round, sign, mod, and pow — with a Degrees/Radians toggle.
Can I export or print my results?
Yes. Every calculator produces Markdown, CSV, JSON, and plain-text artifacts you can copy, download, print, or share — including step-by-step formula reports.
Which formulas back the results?
Molar masses use IUPAC 2021 standard atomic weights, gas law uses R = 8.314462618 J/(mol·K), Coulomb constant k_e = 8.9875517873681764 × 10⁹, and Avogadro N_A = 6.02214076 × 10²³ — all CODATA 2018 values shown in each report.
Can I use hydrates and parentheses?
Yes. The formula parser accepts nested parentheses (Ca(OH)2, Fe2(SO4)3) and hydrate notation (CuSO4·5H2O or CuSO4.5H2O).
Are calculations offline?
Every calculator runs 100% client-side. The periodic table (Z 1–118) is embedded in the bundle — no API keys or network requests.
Can I export or print my results?
Yes — Markdown, CSV, JSON, and plain-text artifacts are generated for every run, with a print-friendly layout.
Which unit system do the calculators use?
SI throughout — metres, kilograms, seconds, newtons, joules, pascals, volts. Where mixed units are common (rpm, degrees, cm optics) the input labels state the unit explicitly.
What value of g do you use?
Standard gravity g = 9.80665 m/s² by default, editable per calculator so you can model any planet or elevation.
How precise are the results?
Physical constants are CODATA 2018. Results are formatted with 4–6 significant figures and switch to scientific notation for very small or very large magnitudes.
Do these calculators require an internet connection?
No — every physics engine is pure JavaScript running in your browser. Nothing is uploaded, cached, or logged.
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