pH Calculator — Convert Between pH, pOH, and Hydrogen Ion
Calculate pH from hydrogen ion concentration, convert between pH and pOH, and classify solutions as acidic, basic, or neutral.
✓ Formula verified: January 2026
pH Calculator
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pH
4.00
pOH
10.00
[H⁺] Concentration (mol/L)
1.0000e-4
Classification
Weak acid
Universal Indicator Color
Orange/Yellow
Scenario Comparison
Conservative (5%)
$16,470.09
$6,470.09 interest
Your scenario (7%)
$20,096.61
$10,096.61 interest
Aggressive (10%)
$27,070.41
$17,070.41 interest
High-risk (14%)
$40,224.71
$30,224.71 interest
Best return
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pH Scale
pH 4.00
0714
Weak acidIndicator: Orange/Yellow
[H⁺] Concentration
1.0000e-4 mol/L
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