Comparison Chart
| Standard Models | fx-82EX | fx-350EX | fx-570EX | fx-991EX |
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| Specifications | ||||
| Number of functions | 274 | 274 | 552 | 552 |
| Power supply | AAA × 1 (R03) | AAA × 1 (LR03) | AAA × 1 (R03) | Two-way power (Solar + LR44 × 1) |
| Approximate battery life | 2 years*1 | 1 year*1 | 2 years*1 | 2 years (LR44)*1 |
| Dimensions H × W × D (mm) | 13.8 × 77 × 165.5 | 13.8 × 77 × 165.5 | 13.8 × 77 × 165.5 | 11.1 × 77 × 165.5 |
| Approximate weight (g) | 100 | 100 | 100 | 90 |
| Case style | Slide-on hard | Slide-on hard | Slide-on hard | Slide-on hard |
| Dot matrix display | 192 × 63 dots | 192 × 63 dots | 192 × 63 dots | 192 × 63 dots |
| Mantissa + exponent digits | 10 + 2 | 10 + 2 | 10 + 2 | 10 + 2 |
| Internal operation digits | 15 | 15 | 15 | 15 |
| Nested parentheses levels | 24 | 24 | 24 | 24 |
| Utilities | ||||
| Natural textbook display / NATURAL-V.P.A.M. |
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| Key rollover function | |
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| Replay function | |
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| Multi-replay functions | |
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| Backspace | |
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| CALC function | - | - | |
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| SOLVE function | - | - | |
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| Answer function | |
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| Variables | 9 | 9 | 9 | 9 |
| Auto power off | |
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| UNDO | |
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| Digit separator | |
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| Multiline display | |
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| Special Features | ||||
| Base-n calculations (Binary/Octal/Hexadecimal) |
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| Logical operations | - | - | |
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| Engineering symbol calculations | - | - | |
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| Engineering notation (ENG/ENG) | |
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| Scientific constants | - | - | 47 | 47 |
| Metric conversions | - | - | 40 | 40 |
| Basic Functions | ||||
| Trigonometric, inverse trigonometric (sin/cos/tan/sin-1/cos-1/tan-1) |
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| Hyperbolic, inverse hyperbolic (sinh/cosh/tanh/sinh-1/cosh-1/tanh-1) |
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| Exponential, logarithmic (log, ln, 10x, ex) |
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| Base specified logarithmic | |
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| Square and square root (x2/ √ ) | |
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| Cubic and cubic root (x3/ 3√ ) | |
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| Power and radical root (xy/ x√ ) | |
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| Fraction | |
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| Percentage calculation (%) | |
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| Rounding | |
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| Sexagesimal ↔ decimal | |
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| Display format (FIX, SCI) | |
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| Angle unit (Degree, Radian, Gradian) | |
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| Angle unit conversion (Degree, Radian, Gradian) |
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| Factorization into prime factors | |
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| Ratio calculation | - | - | |
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| Calculus | ||||
| Differentiation calculation | - | - | |
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| Integration calculation | - | - | |
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| Algebra | ||||
| Simultaneous equation | - | - | (4 unknowns) |
(4 unknowns) |
| Polynomial equation | - | - | (Degree 2, 3, 4) |
(Degree 2, 3, 4) |
| Inequality calculation | - | - | |
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| Table function | |
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| Matrix calculations | - | - | |
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| Complex number calculation | - | - | |
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| Geometry | ||||
| Coordinate conversion (Pol, Rec) | |
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| Vector calculations | - | - | |
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| Probability | ||||
| Combination, permutation (nCr, nPr) | |
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| Statistics | ||||
| Random numbers | |
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| Random integers | |
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| List-based STAT data editor | |
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| Standard deviation | |
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| Regression analysis | |
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| Linear regression | |
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| ab exponential regression | |
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| Other regression | Log, Exp, Pwr, Inv, Quad | Log, Exp, Pwr, Inv, Quad | Log, Exp, Pwr, Inv, Quad | Log, Exp, Pwr, Inv, Quad |
| Advanced statistical distribution calculations | - | - | |
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| Spreadsheet | ||||
| Spreadsheet | - | - | |
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| other | ||||
| QR code | - | - | |
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*1 If used 1 hour daily
