Science & Reference
Look things up and work them out: elements and chemistry calculators, countries, maps and flags, and the planets of the solar system. Everything runs in your browser.
- Interactive Periodic TableAll 118 elements with categories, trends heatmaps and element details.
- Element ExplorerSearch, filter and sort all 118 chemical elements and open their details.
- Molar Mass CalculatorMolar mass and percent composition of any chemical formula, plus grams ↔ moles.
- Chemical Equation BalancerBalance chemical equations, including ionic and redox equations, with an atom check.
- Electron Configuration CalculatorFull and noble-gas electron configurations with orbital diagrams for any element.
Astronomy & Earth
About Pevlika Science & Reference
Science and reference apps for school, study and curiosity. The interactive periodic table, element explorer and electron configuration calculator share one set of element data, while the molar mass calculator and chemical equation balancer do exact calculations from the formulas you type.
The world map, country explorer and flag gallery use public-domain Natural Earth shapes and open flag artwork, and the solar system explorer places the planets for any date between 1800 and 2050. Everything runs in your browser; nothing you enter is uploaded.